The velocity of the ball after it hits the bottle is 19.8 m/s.
What is the final velocity of the bottle?The final velocity of the bottle after the collision is determined by applying the principle of conservation of linear momentum as follows;
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
where;
m₁ is the mass of the ballm₂ is the mass of the bottle u₁ is the initial velocity of the ballu₂ is the initial velocity of the bottlev₁ is the final velocity of the ballv₂ is the final velocity of the bottle( 0.5 x 21 ) + ( 0.2 x 0 ) = 0.5v₁ + (3 x 0.2 )
10.5 = 0.6 + 0.5v₁
0.5v₁ = 9.9
v₁ = 9.9 / 0.5
v₁ = 19.8 m/s
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How many moons and rings does Uranus have?
The Uranus have 13 faint rings and 27 small moons in the solar system.
What is Uranus all about?Uranus, the third-largest planet in our solar system and the seventh from the Sun, is incredibly chilly and windy. The ice giant spins at a nearly 90-degree angle from the axis of its orbit, encircled by 13 foggy rings and 27 tiny moons. One of the two frost giants in the outer solar system is Uranus (the other is Neptune). A heated, dense fluid comprised of the "icy" substances water, methane, and ammonia made up the vast majority (80% or more) of the planet's mass.
Why is Uranus ringed in 13 places?The age of Uranus' rings is predicted to be less than 600 million years, considering them extremely juvenile. The collisional fragmentation of several former moons that ringed the planets resulted to the Uranian ring system.
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charlotte is driving at 57.5 mi/h 57.5 mi/h and receives a text message. she looks down at her phone and takes her eyes off the road for 4.69 s. 4.69 s. how far has charlotte traveled in feet during this time?
During this time charlotte traveled a distance of: 395.36 ft
What is velocity?It is a physical quantity that indicates the displacement of a mobile per unit of time, it is expressed in units of distance per time, for example (miles/h, km/h).
The formula and procedure we will use to solve this problem is:
v= x/t
Where:
x = distancet = timev = velocityInformation about the problem:
x = ?t = 4.69 sv = 57.5 mi/hConverting the velocity from (mi/h) to (ft/s) we have:
v = 57.5 mi/h * 5280 ft/ 1 mi * 1 h/3600 s
v= 84.3 ft/s
Applying the velocity and isolating the distance we have:
x = 84.3 ft/s * 4.69 s
x = 395.36 ft
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For the situation described in the previous question, which cart experiences the greater change in kinetic energy? It's impossible to tell without knowing the initial velocities.
Cart 1 experiences the bigger change in kinetic energy, and this change is independent of the cart's beginning velocity.
An object's kinetic energy is the energy it has as a result of motion. Applying force is necessary if we wish to accelerate an object. We have to put forth work to apply a force. After the job is finished, the object will be travelling at a new, constant speed because energy has been transferred to it. The energy of motion, or kinetic energy, can be seen in the movement of an item or subatomic particle. Kinetic energy is present in every moving object and particle.The formula for kinetic energy is stated as K E = 1 2 m v 2. Where m is the body's mass, v is its velocity, and KE is its kinetic energy.
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if you measured vab as 12.0 v, what is the vba?
The required value of Vba, when the value of Vab is given is calculated to be - 12 v.
Vab voltage drop from the node a to b is measured as 12 v.
So, Vba = ?
Vab can be written as Va - Vb. This value is given as 12 v.
Vab = Va - Vb = 12 v ---(1)
Vba voltage drop from the node b to a can be written as Vb - Va. This value is to be found out.
Vba = Vb - Va = -( Va - Vb) = - 12 v ---(2)
Thus, the value of Vba is calculated to be - 12 v.
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Kentucky fried chicken is asked to measure the difference in electric potential at two different points on an electric circuit. Which measurement device
should he select?
OA. a flux capacitor
OB. a voltmeter
OC. an electrostatic field meter
COD. an ammeter
The measurement device that he should use is B. a voltmeter
What is a Voltmeter?A voltmeter is used for measuring the potential differences. A voltmeter is an instrument used for measuring the potential difference between two points in an electrical circuit.
Hence, it can be seen that because Kentucky fried chicken is asked to measure the difference in electric potential at two different points, they should make use of a voltmeter
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Two different rivers have drops that are the same height. In river A, this section of the river is a waterfall. In river B, this section has a hydroelectric dam. In what way does the energy differ between the drops in the two rivers?
The potential energy of the water would be less at the top of the drop in river A than in river B.
The kinetic energy of the water would be less at the bottom of the drop in river A than in river B.
The potential energy of the water would be greater at the top of the drop in river A than in river B.
The kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.
Answer:
The kinetic energy of the same amount of water would be greater at the bottom of the drop of river A (waterfall) than in river B (hydroelectric dam.)
Explanation:
In a uniform gravitational field, the gravitational potential energy of an object is proportional to height relative to the ground. It is given that the top of the two drops are of the same height. As a result, the same amount of water at the top of the drops would have the same amount of gravitational potential energy.
When water moves from the top of the drop to the bottom, gravitational potential energy is converted into kinetic energy.
In the waterfall of river A, the change in potential energy is nearly entirely converted into kinetic energy. However, in river B, some of that potential energy is converted into the mechanical energy of the hydroelectric generators. Since energy is conserved, the same amount water at the bottom of the river B drop would have less kinetic energy.
A car manufacturer reduces the mass of a car by 250 kg. If the new design is otherwise identical to the old design, how will the new car compare to the old car?
f It will require more fuel to operate.
g It will have a greater gravitational attraction to the road.
h It will need less force to move.
j It will release more gas emissions.
Answer:
h. It will need less force to move.
Explanation:
The reduction in mass of the car means that the car will have less inertia, or resistance to motion. This means that less force will be required to accelerate or maintain motion for the new car design compared to the old car design. Lowering the weight of the car will improve its power-to-weight ratio and thus will be more efficient in terms of fuel consumption and acceleration but this is not directly related to the question.
a firefighting crew uses a water cannon that shoots water at at a fixed angle of above the horizontal. the firefighters want to direct the water at a blaze that is 10.0 m above ground level. how far from the building should they position their cannon? there are two possibilities; can you get them both? (hint: start with a sketch showing the trajectory of the water.)
Projectile motion is the motion of an object that has been launched or thrown and is subject to only the acceleration of gravity.
How far from the building should they position their cannon?The two possibilities are:A distance of 10.0 m from the building, with the cannon aimed at an angle of 45° above the horizontal.A distance of 14.1 m from the building, with the cannon aimed at an angle of 60° above the horizontal.This is a problem in projectile motion. The two possible solutions to this problem involve calculating the angle of the cannon relative to the horizontal and the distance the cannon needs to be from the building.A good way to start is to sketch a diagram of the situation. Draw a line representing the trajectory of the water coming from the cannon, and label the horizontal and vertical distances. The horizontal distance is the distance the cannon needs to be from the building and the vertical distance is the height of the blaze.Using trigonometry, the angle of the cannon relative to the horizontal can be found using the vertical and horizontal distances. The angle of the cannon relative to the horizontal is equal to the inverse tangent of the ratio of the vertical and horizontal distances.The distance the cannon needs to be from the building can then be found by using the Pythagorean theorem. The distance from the cannon to the building is equal to the square root of the sum of the squares of the vertical and horizontal distances.Therefore, the two possible solutions to this problem are the angle of the cannon relative to the horizontal and the distance the cannon needs to be from the building.To learn more about Projectile motion refer to:
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think of the balloon and sweater. for one object (like the balloon) to become negative it means another object (like the sweater) must become equally what?
When a balloon and sweater are rubbed against each other, one of them becomes negative charged while the other becomes positive charged. Both are equal and oppositely charged.
The sweater may become positively charged and the balloon negatively charged if electrons moved from the sweater to the balloon.
Friction is one method of creating charges. Electrons are transported from one thing to another when they come into contact. While the other object acquires a negative charge, one gets positively charged.
It's possible that electrons will transfer from the sweater to the balloon when it is rubbed against it. The balloon acquires a negative charge, whereas the sweater gains a positive charge.
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7. A 50 kg bicyclist on a 10 kg bicycle speeds up from 5.0 m/s to 10 m/s.
Given:
(a) What was the total kinetic energy before accelerating?
(b) What was the total kinetic energy after accelerating?
(c) How much work was done to increase the kinetic energy of the bicyclist? (Hint : Work = Δ KE = KEf - KEi)
Answer:
a)-750J ; b)-3000J ; c)-2
Explanation:
a)- (K.E.1)=mu²/2=60×25/2=750J
b)-(K.E.2)=mv²/2=60×100/2=3000J
c)-Work done= (K.E.2)-(K.E.1)=2250J
A 100 Watt light bulb has an average life of 2000 hours. How much energy does it consume over its lifetime? Give
your answer in Joules.
The energy it consume over its lifetime as per the given values is [tex]7.20X10^6[/tex] joules.
What is electrical power?When an electrical equipment is used, some electrical energy is consumed in order for it to function.
For instance, an electrical bulb uses electrical energy in order to transform it into light energy. Electric power, then, is the pace at which an electrical equipment uses energy or performs its function.
Here, it is given that,
P = 100 W
t = 2000 h = 2000 x 60 x 60 = [tex]7.20X10^6[/tex]
We know that,
Electric power = E/t.
E = P x t
E = [tex]100X7.2X10^6[/tex]
E = [tex]7.20X10^6[/tex] joules
Thus, the energy will be [tex]7.20X10^6[/tex] joules.
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calculate the force generated by a 2.25 bar pressure on an area of 3 cm2 . express your answer in newton.
The force generated by a 2.25 bar pressure on an area of 3cm^2 is 67.5N where Force applied directly relates to pressure.
Given the pressure (P) = 2.25bar
The area (A) = 3cm^2 = 3 x 10^-4m
We know that pressure (P) = Force(F) per unit area = P = F/A
The amount of force acting on a given area is measured by its pressure. As a result, a force exerted across a smaller area will result in more pressure. Area and pressure are inversely related. Both pounds per square inch (psi) and newtons per square meter (N/m2) are acceptable units of measurement for this pressure.
Then, 1bar pressure = 10^5Pascals
F = 2.25 x 10^5 x 3 x 10^-4 = 67.5N
Hence the force required generated by a 2.25 bar pressure on an area of 3 cm2 is 67.5N
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what is the range of the input voltages that will be coded as: (0011 1011 1011 0001)2.
When given the input code 1111, a 4 bit Digital to Analog converter (DAC) produces an output value of 5 V.
A 10-bit ADC has a maximum range of 1024. (2 to the power of 10). The range's actual numbers are 0 to 1023, but what matters for this discussion is that there are 1024 distinct integers. A pin will detect the presence of a voltage level that is either "high" or "low" on a digital input. These voltage levels are provided to you as the boolean values true for high and false for low when you read a digital pin in your program. Since the resolution of a Flash type ADC equals V/(2N), it has a resolution of V/16 for a 4 bit Flash type ADC.
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what do we need to know if we want to measure an object’s mass with newton’s version of kepler’s third law? explain.
To measure an object's mass using Newton's version of Kepler's third law, we need to know the object's distance from the center of a gravitational field and the time it takes to complete one orbit around that center.
Newton's version of Kepler's third law states that the square of the period of a planet's orbit (the time it takes to complete one orbit) is proportional to the cube of its average distance from the center of the gravitational field. Mathematically, this can be expressed as T^2 = k * r^3, where T is the period, k is a constant of proportionality, and r is the average distance from the center of the gravitational field.
To use this equation to measure an object's mass, we need to first determine the value of T and r for the object. This can be done by observing the object as it orbits around a known mass (such as a planet or a star) and measuring the time it takes to complete one orbit and the average distance from the center of the gravitational field.
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what is mass and start 11matirials
The quantity of matter in a fluid or an object is measured by its mass. The kilogram (kg) is the SI unit of mass, while lower masses can also be defined in grams (g). A balance is what you would use to gauge mass.
The SI unit is what?The Internacional Numbering Systems, often known as the Units of Measurement (si) and sometimes SI in all language families, has become the most widely used system of measurement in the world. It is the most recent metric measurement system.
How come SI units are required?We require the Transnational System of Units in order to keep numbers in use on a global scale comparable and consistent. Standardizing such measurements supports society's confidence in data by preserving uniformity and precision.
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if the force on the ball increases linearly for 4.00 ms, holds constant for 20.0 ms, and then decreases linearly to zero in another 4.00 ms, what is the maximum force (in n) on the ball?
The maximum force on the ball is 280 N if the force on the ball increases linearly for 4.00 ms
The maximum force on the ball will be the average of the initial and final forces, which is half of the total force applied. The total force applied over the 28.0 ms time period is the area of the triangle formed by the linear increase, constant force, and linear decrease.
The area of the triangle can be found by calculating its height and width, and then multiplying them together. The height of the triangle is the maximum force applied over the 20.0 ms period, and the width of the triangle is 28.0 ms.
Therefore, the maximum force on the ball is (20.0 ms)(28.0 ms)/2 = 280 N.
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Suppose all charges are now doubled (i.e., q1 = -7.8 μC, q2 = 13.6 μC, q3 = 4.6 μC), how will the electric field at P change?Â
Its magnitude will increase by less than a factor of two and its direction will remain the same
Its magnitude will increase by less than a factor of two and its direction will change
Its magnitude will double and its direction will remain the same
Its magnitude will double and its direction will change
If all charges are doubled, the electric field at point P will change such that, Its magnitude will double and its direction will remain the same. Hence, the correct option is (c).
The electric field at a point is proportional to the charge that creates it. If all charges are doubled, the electric field will also be doubled. This means that the magnitude of the electric field will double, but its direction will remain the same since the charges that create the electric field and the distances between them are unchanged. The electric field is a field that exists in space around charged particles, such as electrons and protons. The electric field represents the influence of the charged particles on other charged particles within the field. The electric field can be thought of as a collection of lines of force that originate from the positive charges and end at the negative charges. Therefore, the correct answer is (c) - its magnitude will double and its direction will remain the same.
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Question - Suppose all charges are now doubled (i.e., q1 = -7.8 μC, q2 = 13.6 μC, q3 = 4.6 μC), how will the electric field at P change? choose the correct option.
(a) Its magnitude will increase by less than a factor of two and its direction will remain the same.
(b) Its magnitude will increase by less than a factor of two and its direction will change.
(c) Its magnitude will double and its direction will remain the same.
(d) Its magnitude will double and its direction will change.
what type of relationship (direct or inverse) exists between wavelength, frequency, and photon energy? what does a photon energy unit of a joule equal?
The photon energy is directly proportional to the photon's frequency. Similarly, the photon energy is inversely proportional to the wavelength of the photon.
A photon is mainly a packet of light from which many radiations emerge. The energy of the photon is given as E=h.f, E=hc/λ. So the energy E is directly proportional to frequency,f and also to 1/λ. Therefore the energy is directly proportional to frequency and inversely proportional to wavelength.
The photon energy unit of one Joule, Using Planck's equation, the energy of a photon can be determined from its wavelength. The energy of a photon is related to its wavelength by Planck's Equation, E=hc/λ. Inspection of this equation shows that as the wavelength decreases the energy increases, which explains why gamma rays having very small wavelengths are dangerous because of their high energy while radio waves having lengths on the order of meters are relatively harmless.
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a 300 g ball with a speed v of 6.0 m/s strikes a wall at an angle of 30o and then rebounds with the same speed and angle. it is in contact with the wall for 10 ms. (a) calculate the impulse experienced by the ball. (b) calculate the average force exerted by the ball on the wall.
a) The impulse experienced by the ball is 1.8 kg·m/s
b) The average force exerted by the ball on the wall is 180 N.
What is Velocity ?
Velocity is a vector quantity that describes the rate of change of an object's position. It is equal to the displacement of an object divided by the time interval over which the displacement occurred. Velocity has both magnitude and direction, and its units are typically meters per second (m/s). The velocity of an object can change over time due to acceleration, and if an object is moving in a circular path, it also has a component of velocity perpendicular to its direction of motion, known as centripetal velocity.
a)
Impulse = change in momentum = mv sin (30) - ( -mv sin30)
= 2mv sin 30
= mv = 0.3 × 6
= 1.8 kg·m/s
b) average force = Impulse/period of application
= 1.8/0.01
= 180 N
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A spring of force constant k = 3000 N/m launches 1-kg marbles upward
into a 20-kg block, as shown at right. The spring is compressed 0.2 m from
its natural length and then released. The marble travels upward 0.2 m as
the spring pushes it and then travels upward an additional 0.8 m to strike
the bottom of the block. The block then flies upward into the air.
106) What is the speed of the marble when it strikes the bottom of the
block?
Answer:
The speed of the marble can be found using the equation for kinetic energy, KE = (1/2)mv^2, where m is the mass of the marble and v is its velocity. Since the marble is being launched by the spring, we can use the equation for potential energy, PE = (1/2)kx^2, to find its velocity.
The potential energy of the spring is (1/2)kx^2 = (1/2)(3000 N/m)(0.2 m)^2 = 600 J
The kinetic energy of the marble is KE = (1/2)mv^2, where m = 1kg, so KE = (1/2)(1 kg)(v^2).
So 600 J = (1/2)(1 kg)(v^2)
Solving for v, we get:
v = sqrt(1200 J/ 1kg)
v = sqrt(1200 m^2/s^2/ 1kg)
v = 34.64 m/s.
Explanation:
Explained above
The process of ____________ occurs when the kinetic energy of the particles of matter decreases to the point at which attractive forces pull the particles into fixed positions.
A. evaporation
B. vaporization
C. condensation
D. solidification
D. Solidification. The process of solidification occurs when the kinetic energy of the particles of matter decreases to the point at which attractive forces pull the particles into fixed positions.
When kinetic energy drops, what happens to the particles?More kinetic energy causes particles to travel more quickly and widely apart. Less energetic particles move more slowly and maintain their proximity.
What happens to the particles' motion as they acquire kinetic energy?Kinetic energy is used to drive the vibrational motion of particles in solids. Heat causes a solid's particles to vibrate more rapidly, giving them more kinetic energy. Faster vibrating particles collide more frequently and more forcefully. The particles are separated farther as a result.
Why do the following matter particles have energy that is referred to as kinetic energy?Solution: Because matter particles7 are constantly moving, they produce kinetic energy by doing so.
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a tank contains 3 ft3 of 120 psig air at 80f. how many tires of volume 1.2 ft3 can be inflated to 28 psig
Approximately 12 tires of volume 1.2 ft³ can be inflated to 28 psig using the given conditions.
How to calculate the number of tyres?To calculate the number of tires that can be inflated, we need to compare the initial and final conditions of the air in the tank and the desired pressure in the tires. Use the ideal gas law to solve this problem.
Given:
Tank volume (V₁) = 3 ft³
Tank pressure (P₁) = 120 psig
Tank temperature (T₁) = 80°F
Tire volume (V₂) = 1.2 ft³
Tire pressure (P₂) = 28 psig
First, let's convert the temperature from Fahrenheit to Rankine:
T₁ = 80°F + 459.67 = 539.67 °R
Next, let's convert the tank pressure from psig to absolute pressure (psi):
P₁ = 120 psig + 14.7 psia = 134.7 psia
Since the volume and pressure of the tire are given directly, we don't need to convert them.
Now, let's apply the ideal gas law to the initial and final conditions:
For the tank:
PV = nRT
For the tire:
PV = nRT
Since the moles of air (n) remains constant, we can equate the two expressions:
(P₁ x V₁) / T₁ = (P₂ x V₂) / T₂
Now, we need to solve for the unknown value, which is the number of tires (n).
Rearranging the equation:
n = (P₁ x V₁ x T₂) / (P₂ x V₂ x T₁)
Substituting the given values:
n = (134.7 x 3 xT₂) / (28 x 1.2 x 539.67 °R)
Now, let's calculate the value of n:
n = (134.7 x 3 x T2) / (28 x 1.2 x 539.67)
To find the number of tires, we need to know the value of T₂, which represents the temperature of the tire.
If the temperature is not specified, we'll assume it remains the same as the initial temperature (T₁ = 539.67 °R).
Substituting T₂ = T₁:
n = (134.7 x 3 x 539.67) / (28 x 1.2 x 539.67)
n = 12.308
Therefore, approximately 12 tires of volume 1.2 ft³ can be inflated to 28 psig using the given conditions.
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correct answer issss ??
Answer:
Bbbbbbbb 12 b/c
Explanation:
i1=6A
i2=v/R
i2=24/4=6A
i1+i2=6+6=12A
the frequency 100 mhz (100 million cycles per second) is right in the middle of the fm dial on your radio. what is the wavelength of these waves?
The wavelength of radio waves with a frequency of 100 MHz is approximately 3 meters.
What is wavelength of radio waves?
Radio waves have a wavelength range from about 1 millimeter to 100 kilometers. The wavelength of an electromagnetic wave can be calculated using the formula:
wavelength (λ) = speed of light (c) / frequency (f)
where the speed of light in a vacuum is approximately 299,792,458 meters per second (c = 3 x 10^8 m/s). So, for a frequency of 100 MHz (100 million cycles per second), the wavelength can be calculated as:
[tex]λ = c / f = 3 x 10^8 m/s / 100 x 10^6 Hz = 3 m[/tex]
So the wavelength of radio waves with a frequency of 100 MHz is approximately 3 meters.
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Please help! Due tonight
How does the thermodynamic laws (0th, 1st, 2nd, 3rd) describe boiling water?
The zeroth, first and second laws of thermodynamics can be applied to a boiling water.
What is thermodynamics?We know that the study of thermodynamics would have to do with the transfer of heat form one object to the other.
In this case, we know that water is boiling, it is going to attain a thermal equilibrium in line with the zeroth law of thermodynamics. Then the transfer of heat between the water and the environment can be accounted for by the first and the second laws of thermodynamics. We can not be able to apply the third laws of thermodynamics to the system of a boiling water.
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how many watts will be radiated from a spherical black body 1115cm in diameter at a temperature of 800c
A spherical black body 1115 cm in diameter at a temperature of 800 K will radiate approximately 5085798.666 W.
The total power radiated from a black body can be calculated using the Stefan-Boltzmann law, which states that the power per unit area (P) emitted from a black body at temperature T is given by:
P = σ x T^4
where σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/m^2K^4).
The total power radiated from a sphere with diameter D can be calculated as:
P = 4 x π x (D/2)^2 x σ x T^4
Plugging in the values D = 1115 cm, T = 800 K, we get:
P = 4 x π x (1115/2 cm)^2 x 5.67 x 10^-8 W/m^2K^4 x (800 K)^4
P = (4 x π x (1115/2 cm)^2) x (5.67 x 10^-8 W/m^2K^4) x (800^4 K^4)
P = (4 x π x (0.1115 m)^2) x (5.67 x 10^-8 W/m^2K^4) x (800^4 K^4)
Converting the units to watts, we get:
P = 4 x π x (0.1115 m)^2 x 5.67 x 10^-8 W/m^2K^4 x 800^4 K^4
P = 4 x π x 0.0126225 m^2 x 5.67 x 10^-8 W/m^2K^4 x 64000000 K^4
P = 4 x π x 0.0126225 m^2 x 5.67 x 10^-8 x 64000000 W
P = 4 x 3.14 x 0.0126225 m^2 x 5.67 x 10^-8 x 64000000 W
P = 5085798.666 W
So, a spherical black body 1115 cm in diameter at a temperature of 800 K will radiate approximately 5085798.666 W.
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Draw lines to match the wave terms with the correct description.
Amplitude - Highest line
Trough - Lowest point
Crest - Distance between top and rest position
Oscillate - Back and forth motion
Amplitude - Distance between top of crest and rest position
Frequency - Number of waves per second
Wavelength - Distance between two crest or troughs
Compression - Where particles are close together
Rarefaction - Where particles are farthest apart
Incident wave - The wave that moves towards an object
Reflected wave - The wave that moves off an object
Superpose - When waves add or cancel out
Reflect - When a wave bounces off an object
What are the terms that describe waves?A wave is a disturbance that travels through a medium, carrying energy from one place to another without the permanent transfer of matter.
The terms that are used to describe a wave are;
Amplitude
Wavelength
Frequency
Period
Velocity
Crest
Trough
Polarization
Interference
Diffraction.
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joe and tom are competing in a 100 m race. partway through the race, joe is 50 m from the finish line and moving at 10 m/s and tom is 51 m from the finish line and moving at 9.75 m/s. if joe maintains his speed and tom begins accelerating, what magnitude of constant acceleration must tom have so that they finish the race in a dead heat
Tom must accelerate at a constant rate of 0.25 m/s2 in order to finish the race in a dead heat with Joe.
What is accelerate?Accelerate is an action or process of speeding up or increasing in rate or amount. It is commonly used to describe an increase in the rate of change of velocity, or the rate of change of a variable such as time, speed, or distance. Acceleration can be generated by a variety of forces and factors, such as gravity, electrical current, centrifugal force, friction, and aerodynamic drag.
Tom must have a constant acceleration of 0.25 m/s2 in order to finish the race in a dead heat with Joe. This can be calculated using the equation for average velocity, vavg = (v1 + v2)/2, where v1 is Joe's velocity and v2 is Tom's velocity. If Joe and Tom both have the same final velocity, then their average velocity must be equal.
50 m / 10 m/s + 51 m / (9.75 m/s + a) = (10 m/s + a)
Solving for a, we get a = 0.25 m/s2. Therefore, Tom must accelerate at a constant rate of 0.25 m/s2 in order to finish the race in a dead heat with Joe.
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a friend incorrectly says that a body cannot be rotating when the net torque acting on it is zero. what is the correct statement?
The correct statement is that a body's rotation cannot change if the net torque acting on it is zero. This means that if there is no net torque acting on a body, its angular velocity will remain the same and it will not be able to rotate.
This is because when the net torque acting on a body is zero, the sum of all external torques is also zero. This means that the body's angular momentum is conserved, meaning that the body's angular velocity remains the same over time and it is unable to change its rotation. This can be demonstrated through Newton's second law of motion, which states that the rate of change of angular momentum is equal to the net torque acting on the body.
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when a charged ruler attracts small pieces of (originally uncharged) paper, sometimes a piece jumps quickly away after touching the ruler. why?
When a charged ruler attracts small pieces of paper sometime a piece gems quickly away after touching the ruler because that piece gets neutral after getting touched with ruler.
When we use a charged ruler to attract the small pieces of paper which for originally uncharged, we see that the pieces of paper gets attracted by the ruler but sometime we say that some of the pieces gets quickly away from the ruler after touching it.
This is simply because after touching the charged ruler the electrical neutrality comes into play between the charged particles.
As we know that the neutral objects do not attract each other the pieces of paper gets quickly away.
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