216.66 m/s² is average acceleration of mx missile.
Given information:
initial velocity, u = 0m/s
final velocity, v = 6.5km/s = 6500 m/s
time taken, t = 40s
To calculate average acceleration:
a = [tex]\frac{( v - u)}{t}[/tex]
a = [tex]\frac{(6500 - 0)}{30}[/tex]
a = 216.66 m/s²
Acceleration at any moment is defined as rate of change of haste with time. For the entire trip, average acceleration is defined as rate of change in haste with time taken.
When an object peregrination at a vertical speed of about,000 km/ hr or further, it goes into route once it's above the atmosphere. The satellites need to reach that threshold speed (orbital haste) in order to circumvent Earth.
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A 10-N falling object encounters 10 N of air resistance. The net force on the object is a. 4 N. b. 6 N. c. 10 N. d. 0N e. none of these
If an object weighs 10 N and is falling to the ground while encountering air resistance of 10 N, the net force acting on the object will be zero N.
Describe force.In physics, a force is an input that has the ability to alter the motion of an object.
A force can cause an object with mass to move at a different speed or accelerate. A push or a pull can also be used to describe forces intuitively. Considering that a force is a vector quantity, it does have strength and direction. It is measured in terms of the SI unit, the metric newton (N).
As per given information,
The object weighs 10 N.
Air resistance + friction = 10 N
The net force will then be,
10 - 10 = 0 N
The net force will therefore be 0 N.
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an object has velocity relative to the ground. an observer moving past with a constant velocity relative to the ground measures the velocity of the object to be (relative to the observer). the magnitudes of these velocities are related by (a) (b) (c) (d) all the above are true. 17. (a) a boy sitting in a railroad car moving at constant vel
The right answer is (C). These velocities' magnitudes are connected by the formula v(2)v(o)+ v (1)
What is speed?The direction of a body or object's movement is defined by its velocity. Through its basic form, speed is just a scalar quantity. In essence, velocity is a vector quantity. It refers to the speed at which distance changes. It is the migration change rate.
Why is velocity a vector unit?Velocity is a vector quantity because it has alike magnitude and direction. Speed is a scalar quantity because it just has magnitude and no direction.Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt.
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the complete question is -
An object has velocity v(1) relative to the ground.An observer moving with a constant velocity v(o) relative to the ground measure the velocity of the object tov(2) be (relative to the observer). The magnitudes of these velocities are related by
(a) v(o)≤v(1)+v(2)
(b) v(1)≤v(2)+v(o)
(c) v(2)≤v(o)+v(1)
(d) All of the above are true
Are you L-O-S-T after Reflection?
ben starts waling at 2 mi/h. after an hour and a half amanda begins jogging at 6 mi/h. how long until amanda catches ben
Amanda would need to catch up to Ben in 6/10 hours, or 0.6 hours.
What is distance?Use the distance equation d = st, which reads distance equals speed times time, to find the distance. Given that both rate and speed denote a specific amount of travel per unit of time, such as miles per hour or kilometers per hour, they are comparable. R = s = d/t indicates that rate r is equal to speed s.
At 7 miles per hour, Amanda starts jogging down the same path.
Thus, following t hours, Amanda's position is determined by:
A(t) = 7t
Ben begins moving at a 2mph pace along a path.
Ben will be at position 2×1.5 = 3 when Amanda departs in an hour and a half. Ben's position therefore after t hours is as follows:
B(t) = 3+2t
A(t) = B(t)
7t = 3+2t
5t = 3
t = 3/5
t = 0.6hrs
So, Amanda will catch up Ben after 0.6 hours.
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Complete question " Ben starts walking along a path at 2 mi/h. One and a half hours after Ben leaves, his sister Amanda begins jogging along the same path at 7 mi/h. How long (in hours) will it be before Amanda catches up to Ben?".
if a 20.0 n brick is placed on top of the wooden block, what force will be required to keep the block and brick moving at constant velocity?
If a 20.0 n brick is placed on top of the wooden block, the force that will be required to keep the block and brick moving at constant velocity is 21N.
Given a wooden block is placed on smooth table.
Force exerted on the block (Fn) = 14N
Weight of the block (W) = 40N
The block is moving at constant velocity.
Then sliding frictional force acts on the block which is = Ff = Force exerted on the block.
Let the coefficient of sliding friction = µ
We know that force exerted Ff = Fn
µ(W) = Fn then µ = Fn/W
µ = 14/40 = 0.35
(a) Hence the coefficient of sliding friction is 0.35
(b) Again 20 N weight is added to the existing block.
Then total weight on the block (W) = -40 -20 = -60N
It acts as normal force = Fn = 60N
To keep the block and brick moving at constant velocity Force needed = Ff = µFn
Ff = 0.35 x 60 = 21N
Hence the force that will be required = 21N
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complete question: A smooth wooden block is placed on a smooth wooden tabletop. You must exert a 14.0N force to keep the 40.0N block moving at constant velocity.
a. What is the coefficient of sliding friction?
b. If a 20.0N brick is placed on the block, what force will be required to keep the block and brick moving at constant velocity?
a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18m/s. the cliff is 50m above a flat, horizontal beach. how long after being released does the stone strike the beach below the cliff? with what speed and angle of impact does the stone land?
A pupil throws a stone 18 meters per second over a cliff's edge while standing there. The cliff rises 50 meters above a horizontal, level beach. Consequently, the stone's speed is 21.984 m/s.
Which way is horizontal?Everything equal to the horizon is said to as horizontal.Anything that forms a bend with the normal or the ceiling is said to as vertical because it is the inverse of horizontal. The line that spans across left to right is therefore considered to be horizontal.
Calculation
The time taken to reach the ocean from the cliff is 2.24 seconds
The speed of the stone at the point of contact is 21.984 m/s
The stone is thrown horizontally with a speed of 19.5 m/s from the cliff
The height of the cliff = 24.6m
The time taken by the stone to reach the ocean can be calculated using the formula
y - v₁t = -1/2 gt²
where y is the height of the cliff
v₁ is the speed of stone vertically
g is the acceleration due to gravity
t is the time taken
But the speed of the stone vertically will be zero, v₁ = 0
Therefore, the equation becomes
y = -1/2gt²
Let us re-write this equation in order to find t
t = √(-2y/g)
Now, let's substitute the known values in the above equation, we get
t = √(-2x -24.6 / 9.8)
=√(49.2/9.8)
= √5.02
= 2.24 seconds
Therefore, the time taken to reach the beach is 2.24 seconds
The speed of the stone at the point of impact can be found using the formula a = v/t
where a is the acceleration
v is the velocity
t is the time taken
Here, the acceleration is the acceleration due to gravity
Thus, the velocity of the stone is
v = at
= 9.8 x 2.24
= 21.984 m/s
Therefore the velocity of the stone is 21.984 m/s
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1. If the dielectric becomes damaged it can 'break down' like the air does when lightning strikes. What would happen to the charge on the plates?
Answer:
Explanation:
When the dielectric becomes damaged, it can no longer prevent the charge on the plates from leaking out. This process is known as dielectric breakdown. When the dielectric breaks down, the charge on the plates will begin to dissipate. This can result in a spark or arc, as the charges will be forced to jump the gap and form a conductive path. This can lead to potentially dangerous situations, as the energy released can be quite high. Additionally, the sudden change in the electric field can cause other electrical components to be damaged or destroyed, depending on the amount of energy released.
Figure 9-23 shows an overhead view of three particles on which external forces act.The magnitudes and directions of the forces on two of the particles are indicated. What are the magnitude and direction of the force acting on the third particle if the center of mass of the three-particle system is (a) stationary, (b) moving at a constant velocity rightward, and (c) acc
(a) The magnitude and direction of the force acting on the third particle is zero, as the center of mass of the three-particle system is stationary.
(b) The magnitude and direction of the force acting on the third particle is equal in magnitude but opposite in direction to the force of the other two particles, as the center of mass of the three-particle system is moving at a constant velocity rightward.
(c) The magnitude and direction of the force acting on the third particle is equal in magnitude but opposite in direction to the acceleration of the center of mass of the three-particle system.
What is center of mass?
Center of mass (also known as the center of gravity) is the average location of all the mass in a system.
It is the point at which the entire mass of an object can be assumed to be concentrated. It is used to calculate the force of gravity acting on an object, as well as its response to forces applied to it.
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The acceleration due to gravity on the Moon is gM. Suppose an astronaut on the Moon drops an object from a height of H. The time it would take the object to reach the Moon’s surface would be TM. The same object is dropped from the same height on Earth, where the acceleration due to gravity is gE. The time it takes the object to reach the Earth’s surface is TE. Which of the following is a correct mathematical relationship for the two times?A. TE = √gE/gM . TM B. TE = √gM/gE . TMC. TE = gE/gM . TM D. TE = gM/gE . TM E. TE = TM
The correct mathematical relationship for the two times is Option B: TE = √gM/gE . TM.
What is gravity?Gravity is a natural phenomenon that causes objects with mass to be attracted to one another. It is one of the four fundamental forces in nature and is responsible for the formation and structure of galaxies, stars, and planets. Gravity is experienced as a force pulling objects towards each other. The strength of gravity depends on the distance between two objects, as well as their masses.
This is because the acceleration due to gravity is inversely proportional to the time taken for an object to fall. The equation for this is:
Time = √2*Distance/Acceleration.
Therefore, if we substitute the values for the Moon and Earth in this equation, we get:
TE = √gM/gE . TM
where gM and gE are the accelerations due to gravity on the Moon and Earth, respectively, and TM and TE are the times taken for the object to reach the Moon's and Earth's surfaces, respectively.
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two charged ping-pong balls separated by a distance of 1.53 m exert an electric force of 0.0174 n on each other. what will be the force if the objects are brought closer, to a separation of only 29.7 cm?
If the particles are closely connected, to a distance of only 29.7 cm, the force is equal to 1.024N.
Describe a force.Force is indeed a necessary attribute that alters or has the potential to alter an object's posture of rest as well as motion as well as its shape.
What kinds of forces are there?These are the kinds of forces that occur when two objects come into contact with one another physically. There are several different kinds of contact forces, including friction, tensions, normal force, acting on an object force, applied force, and spring force.
Coulomb's law F = kQ1Q2/d^2
kQ1Q2 = Fxr^2
Substituting,
kQ1Q2 = 0.0174N x (1.53m)^2
kQ1Q2 =0.0532
29.7cm = 0.297 m
F = kQ1Q2/d^2
= 0.059/(0.297)^2
F = 1.024N
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1. If the dielectric becomes damaged it can 'break down' like the air does when lightning strikes. What would happen to the charge on the plates?
2. Here are some statements about how an image is produced and processed in a digital camera.
A) Starting in one corner the charge on each square is moved off the CCD.
B) Light enters the camera.
C) That signal can be stored or sent to a computer or other device.
D) The charges on each square are converted into a digital signal.
E) When the light hits a square on the CCD charge is produced.
a. They are in the wrong order. Write the letters for the statements in the correct order.
b. Explain why there is a delay between taking one photograph with a digital camera and taking the next photograph.
Answer:
Explanation:
A) E) When the light hits a square on the CCD charge is produced
B) A) Starting in one corner the charge on each square is moved off the CCD
C) D) The charges on each square are converted into a digital signal
D) B) Light enters the camera
E) C) That signal can be stored or sent to a computer or other device
b. The delay between taking one photograph with a digital camera and taking the next photograph is due to the time it takes to capture the image and process it into a digital signal. This process includes the capturing of the light entering the camera, the conversion of the charges on each square of the CCD into a digital signal, and the storage or sending of the signal to a computer or other device.
what are the magnitudes of the angular velocity, the radial acceleration and the tangential acceleration of a spaceship taking a circular turn of raius 3240 km
The angular velocity of a spaceship taking a circular turn of radius 3240 km is equal to the circumference of the circle divided by the time it takes to complete the turn, or 2πr/t.
What is circumference ?
Circumference is the distance around the outside of a circle or other curved shape. It is calculated by taking the diameter of the circle and multiplying it by pi (approximately 3.14).
It is also sometimes referred to as the perimeter of a circle. Circumference is an important measurement in geometry, allowing us to calculate the area of a circle, or the distance between two points on a circle. It can also be used in practical applications such as determining the size of a wheel or the capacity of a container.
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Does the displacement of an object depend on the specific location of the origin of the coordinate system
Nope, your reference point can be anywhere because displacement is simply the change in position. So regardless of where your origin is, the change in position (displacement) is independent.
What is an example of a displacement?Alteration in an object's location in relation to a reference frame is known as displacement. For instance, a billiards ball travels from one spot to another as a player strikes it. It is alleged to have moved. A vector quantity with the both magnitude and direction is displacement.
Are displacement and distance the same thing?Sometimes people mistakenly believe that length and displacement are simply two different labels for the same thing. Displacement and distance, however, are two distinct ideas. The total distance covered is larger than movement between those two places if an item changes direction while traveling.
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a beam of microwaves has a frequency of 1.0 times 109hz, a radar beam has a frequency of 5.0 times 1011th hz which type of radiation has the longer wave length
A beam of microwave having a frequency of 1.0 times 109hz will have a longer wavelength.
Microwaves and radar are two types of electromagnetic radiation that are used in a variety of applications. The frequency of a microwave is 1.0 times 109hz, while the frequency of a radar beam is 5.0 times 1011th hz.
When comparing the two, the radar beam has a much higher frequency, but the microwave has the longer wave length.
To calculate this, we can use the equation c = λf, where c is the speed of light, λ is the wavelength, and f is the frequency. Using this equation, we can calculate that the wavelength of the microwave is 3.00 x 10-2 meters, while the wavelength of the radar beam is 6.00 x 10-3 meters. Therefore, the microwave has the longer wave length.
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g is the temperature of a metal rod measured in at a distance x inch from one end of the rod, then the units of measure of the derivative are
The units of measure of the derivative of g with respect to x (dg/dx) would be units of temperature per inch (e.g. °F/inch or °C/inch).
The derivative of a function is a measure of how the function is changing with respect to its independent variable. In this case, g represents the temperature of a metal rod, and x is the distance from one end of the rod.
Therefore, the derivative of g with respect to x (dg/dx) gives us the rate at which the temperature is changing with respect to distance.
The units of measure for the derivative will be the units of the dependent variable (temperature) divided by the units of the independent variable (distance).
For example, if g is measured in degrees Celsius and x is measured in inches, then the derivative dg/dx would have units of degree Celsius per inch (°C/inch).
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4. a 1000 kg sports car moving at 20 m/s crosses the rounded top of a hill (radius of 100 m). determine a) the normal force on the car, b) the normal force on the 70 kg driver, and c) the car speed at which the normal force equals zero.
The normal force on car is 62167 N.
Given information:
mass of car m(car) = 1000kg
speed of car v = 20m/s
radius of path r = 100m
mass of driver m = 70kg
The weight of the car and driver
a) W = (m (car) + m) g
= 10496.7 N
The centripetal force of applied to the car and driver.
F(c) = ( Mcar + M) V²/R
The expression for the force balance along the normal direction is:
W = N - F(c) --------------------equation1
N = 62167 N
b) The weight of driver is:
N = W - mv²/r
= 406.7 N
c) From the equation 1, if normal force is zero.
v² = rg
By putting value in this equation
v = 31.32 m/s
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what is the maximum displacement after one time constant has elapsed in terms of the initial amplitude,
The highest deviation of the item from equilibrium, measured either in the positive or negative x-direction, is called the oscillation's amplitude, or A.
When the velocity reaches zero, the maximum displacement happens. (Why? You have the option of thinking physically or mathematically.) Additionally, the derivative of the velocity with respect to time is the acceleration. x(t) equals A cos(t + a).
The highest deviation of the item from equilibrium, measured either in the positive or negative x-direction, is called the oscillation's amplitude, or A. Repetitive harmonic motion is simple. The length of time (period T) required for an object to complete one oscillation and return to its initial position
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If an object'$ mass is decreasing while constant force is applied to the object; the acceleration a. decrceases b. remains the same c. increases.
If an object' mass is decreasing while constant force is applied to the object, the acceleration will increases option -c is correct.
Explain what acceleration is.Acceleration is the rate at which the speed and direction of a moving object change over time. When something speeds up or slows down, it is said to be accelerating. Motion on a circle accelerates even when the speed is constant because the direction is always changing.
An object's motion is altered by a net force; the greater the net force, the greater the acceleration. To accelerate at the same rate as less massive objects, heavier net forces are needed.
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What causes friction between two surfaces? How can friction be reduced?
Answer:
Explanation:
Friction between two surfaces is caused by the contact between them. When two surfaces interact, the roughness of the surfaces combine with the contact force to create a force that resists the motion of the surfaces. When two surfaces are moving relative to each other, the contact force must overcome the friction force in order for the surfaces to move.
Friction can be reduced by either reducing the contact force, or by making the surfaces smoother. One way to reduce the contact force is by using a lubricant, such as oil or grease, to reduce the amount of contact between the surfaces. This reduces the force of friction and allows the surfaces to move more easily. Another way is to make the surfaces smoother, which reduces the amount of roughness and therefore reduces the friction. This can be done with sandpaper or other abrasive materials.
A car travels around a turn of radius 75 m on a road. it is snowing and icy outside. the coefficient of friction between tires and road is 0.60, what is the maximum speed the car can travel without slipping?
On a road, an automobile moves around a turn with a 75 m radius. The weather is freezing and snowy. the correlation Therefore, the car's top speed without slipping is roughly 6.8 m/s.
How politely would you say "approximately"?The most professional way to say "not precisely" is "roughly," although "about" is more frequently used in everyday English. An average coffee costs $3. What will the price be, more or less? He makes about $30,000 each year.
Calculation
To find the maximum speed the car can travel without slipping, you can use the formula:
v = sqrt(μ * g * r)
where v is the maximum velocity, μ is the coefficient of friction, g is the acceleration due to gravity (9.8 m/s^2), and r is the radius of the turn.
Plugging in the given values, you get:
v = sqrt(0.60 * 9.8 m/s^2 * 75 m) = sqrt(45.9 m^2/s^2) = 6.8 m/s
So the maximum speed the car can travel without slipping is approximately 6.8 m/s.
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A bat emits a series of high-frequency sound pulses as it approaches a moth. The pulses are approximately 70.0 ms apart and each is about 3.0 ms long. How far away can the moth be detected by the bat, so that the echo from one chirp returns before the next chirp is emitted?
Answer:
The moth can be detected by the bat when it is about 21 meters away.
Explanation:
This is because the sound waves travel at about 340 meters per second, so it takes about 70 milliseconds for the sound waves to travel from the bat to the moth and back again.
____________ is the rate that an object moves in a certain direction. Question 11 options: speed displacement direction velocity.
Velocity is the rate that an object moves in a certain direction.
According to the dictionary, direction refers to how something moves, how to get somewhere in particular, how something is taking shape, or which way you are facing. Direction can be expressed using relative vocabulary, such as up, down, in, out, left, right, forward, backward, or sideways, which compares the location of one thing to another. Velocity is the directional speed of an item in movement as a measure of the rate that its location is changing as seen from a certain view point and as determined by a specific unit of time.
The entire displacement of the object divided by the total time elapsed gives the object's average velocity.
Velocity and speed both refer to how rapidly and in what direction an object moves. Speed in a certain direction is referred to as velocity in physics. It calculates the distance an object travels in a specific length of time. The definition of velocity is the distance that an object travels in one unit of time.
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always use significant figure rules. remember that these rules apply to all numbers that are measurements. one complete wave passes a putrefying pile of poached pickerel in 0.50 seconds. the piled pickerel protrude 20 cm along the beach. calculate the period of the wave. s
The time T is identical to 0.50 seconds since one whole wave completes in 0.50 seconds. F = 1/D = 1/0.5 = 2 Hz, where T = 0.5 Frequency.
What exactly is a wave?A wave, according to Webster's dictionary, is a perturbation or variation that gradually transfers energy from one place to another inside a medium. It can be a multiple and complex or a change in pressure, magnetic or electrical strength, electric potential, or heat.
How is a wave formed?Water moves in a circular pattern as a result of energy traveling through it, creating waves. Water does not, however, literally move in waves. Without obstruction, waves can potentially flow across the ocean, transmitting energy rather than water.
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A magnetic field of magnitude 0.48 T is directed vertically upward. (a) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is vertical. (b) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is horizontal. (c) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is at angle of 54° with the horizontal.
The magnetic flux is 9.12Wb, the magnetic flux, if the surface is horizontal, is 0, the magnetic flux in the area is 19 and angle 54 is 5.08Wb.
(a) The magnetic flux through a flat surface of area 19 cm2 if the surface is vertical can be calculated using the formula
Φ = BA, where Φ is the magnetic flux, B is the magnetic field strength, and A is the area of the surface. In this case, the magnetic flux is
0.48T ×19 cm² = 9.12 Wb.
(b) The magnetic flux through a flat surface of an area 19 cm2, if the surface is horizontal, is 0 Wb. This is because the magnetic field is directed vertically upward, so it will not be able to penetrate through a horizontal surface.
(c) The magnetic flux through a flat surface of area 19 cm2, if the surface is at an angle of 54° with the horizontal, can be calculated using the formula Φ = BAcosθ, where θ is the angle between the magnetic field and the surface. In this case, the magnetic flux is
0.48T ×19 cm²× cos(54°) = 5.08 Wb.
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Help appreciated!!!
I need two paragraphs on the difference between day and night !!! Thank you!
Answer:
day have always sun light but night is full of dark with moon light
Auming the ma of the moon i 7. 4X10^22kg and it' radiu 1. 7X10^6m, what i the gravitational energy of 1kg ma at the moon' urface. Auming R= 6. 4X10^6
The acceleration due to gravity on the surface of the moon is 1.620 ms
2 . if Auming the ma of the moon i 7. 4X10^22kg and it' radiu 1. 7X10^6m
Why gravity is a force?However, in the broader sense, gravity is indeed a force because it describes the resulting interaction between two masses. Gravitational effects are fundamentally caused by the warping of spacetime and the motion of objects through the warped spacetime.
Who found gravity in India?Rajasthan Education Minister Vasudev Devnani has said that Brahmagupta-II discovered the law of gravity before Isaac Newton. Speaking at a programme at Rajasthan University here on Monday, he asserted that Brahmagupta-II came up with the gravitation law a thousand years ago.
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Between which adjacent pairs of positions is the change in kinetic energy of the ball the greatest?
The greatest change in kinetic energy of the ball will be between Position 1 and Position 2.
What is kinetic energy?Kinetic energy is the energy an object has due to its motion. It is the energy an object has as a result of its mass and velocity. Kinetic energy is measured in units of joules (J). Kinetic energy is one of the two main forms of energy, the other being potential energy. Kinetic energy can be converted into other forms of energy such as thermal energy and potential energy.
Kinetic energy is transferable and can be used to do work, such as in a car engine. Kinetic energy can also be converted into heat, sound, and light. Kinetic energy increases as the velocity of an object increases. As an object’s velocity increases, its kinetic energy also increases. The kinetic energy of an object is also affected by its mass. The greater the mass of an object, the greater its kinetic energy.
Gravitational potential energy
W = mgh
The height and gravity in Position 1 is greatest
So from 1 to 2 the outcome will be greatest too
Thus, The greatest change in kinetic energy of the ball will be between Position 1 and Position 2.
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Complete Question:
A ball is suspended by a lightweight string, as shown in the figure above. The ball is displaced to position 1 and released. The four labeled positions are evenly spaced along the arc of the ball’s motion. Between which adjacent pairs of positions is the change in potential energy of the ball greatest?
A. Position 1 and Position 2
B. Position 2 and Position 3
C. Position 3 and Position 4
D. The change is the same for all adjacent pairs
why does a canvas tent leak when touched when it's raining
Question is attached. Show Workings.
1) The force of the object is 2.25 * 10^-11 N
b) The force of the object is 5.63 * 10^-12 N
2) The mass of the object is 72 Kg
c) The acceleration due to gravity is 9.7 m/s^2
What is the gravitational force?We know that the gravitational force does speak of the force that is acting between two masses. It should be known that the gravitational force would depend both on the magnitude of the forces and on the distance apart.
Given that;
F = G m1m2/r^2
F = force on the objects
m1 and m2 = masses of the objects
G = Gravitational constant
r = distance of separation
1) F = 6.6 * 10^-11 * 35 * 35/60^2
F = 8.1 * 10^-8/3600
F = 2.25 * 10^-11 N
b) The force would then be; 1/4 * 2.25 * 10^-11 N =5.63 * 10^-12 N
2) 7 * 10^-9 = 6.6 * 10^-11 * m^2/7^2
m^2 = 49 * 7 * 10^-9 /6.6 * 10^-11
m =√49 * 7 * 10^-9 /6.6 * 10^-11
m = √3.43 * 10^-7/6.6 * 10^-11
m = 72 Kg
3) g = Gme/r^2
g = 6.6 * 10^-11 * 6.0 * 10^24/(6.38 * 10^6)^2
g = 39.6 * 10^ 13/4.1 * 10^13
g = 9.7 m/s^2
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wilma i. ball walks at a constant speed of 5.20 m/s along a straight line from point a to point b and then back from b to a at a constant speed of 3.15 m/s. (a) what is wilma's average speed over the entire trip?
The average speed of Wilma over the entire trip is 3.92 m/s.
What is speed?The speed at which an object's location changes in any direction. The speed of an item, which is a scalar quantity, is the size of the change in its location over time or the size of the change in its position per unit of time.
Let us consider that distance between A and B is x, time taken by Wilma to go from point A to point B is t1 and time taken by Wilma to go from point B to A is t2.
Given,
x=5.20 t1
x=3.15 t2
t1=[tex]\frac{x}{5.20}[/tex], t2=[tex]\frac{x}{3.15}[/tex]
Average speed= v=[tex]\frac{2x}{t1+t2}[/tex]
v= [tex]\frac{2x*16.38}{3.15x+5.20x}[/tex]
v=[tex]\frac{32.76x}{8.35}[/tex]
v=3.92 m/s.
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