The total resistance of the circuit is 25 ohms.
How can the resistance of a circuit with four resistors in parallel be determined?In the same way, if three or more resistors of the same value are connected in parallel, the equivalent resistance will be equal to R/n, where R is the resistor's value and n is the total number of resistors in the arrangement.
How do you calculate a parallel resistor's total resistance?The total current flowing from the source is the sum of the currents through each of the paths. Using the following formula, you can get the overall resistance in a parallel circuit: 1/Rt = 1/R1 + 1/R2 + 1/R3 +... Even if one of the parallel channels breaks, current will still flow.
[tex]R_{total}[/tex] = 100/4 = 25ohms
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what is the upper block's acceleration if the coefficient of kinetic friction between the block and the table is 0.13?
The answer is 2.416 m/s^2.
Solution:
friction force on the upper block = umg
= 0.13*2*9.81
= 2.5506 N
so writing the equation of motion for the upper block
T - f = ma
or T-2.5506 = 2a
writing the equation of motion for the lower block
mg-T=ma
or 9.8-T=a
Hence, we get a = 2.416 m/s^2.
Since the top block slides to the right, the frictional force acting on it acts to the left. His reaction wall acts on the forward-acting lower block. The frictional force absorbs x mechanical energy from the upper block, but transfers only y mechanical energy to the lower block. To find the acceleration of the body in terms of angle and coefficient of friction.
A material modulus value of 1 means that the friction force is equal to the normal force. This means that the force required to move an object is equal to its weight. An object may have a friction value greater than 1. There are two types of friction coefficients: static friction coefficient and dynamic friction coefficient. The former is sometimes called the initial friction coefficient and the latter is sometimes called the dynamic or sliding friction coefficient.
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blood is flowing through an artery of radius 2.0 mm at a rate of 33.0 cm/s. determine the flow rate and the volume that passes through the artery in a period of 20 s.
The flow rate and the volume that passes through the artery in a period of 20 s is Q= 4.1448cm³/s and V= 82.896cm³.
How is a flow rate calculated?We must define both the volume V and the instant in time it is flowing past represented by t in order to determine the Flow Rate denoted by Q, which is equal to V/t. In addition, the relationship between flow rate and velocity can be seen in the equation Q = Av, where A is the flow's cross-sectional area and v is its average velocity.
We must utilize the equation Q=V x A, where Q is the flow rate, V is the velocity, and A is the area, to determine the flow rate.
We must apply this formula to determine the volume. V = Q x t, where Q is the flow rate, t is the time, and V is the volume.
Converting 2mm to cm is the first thing we must accomplish.
2mm x 0.1= 0.2 cm
Currently, we utilize the calculation Q=V x A, but we must keep in mind that the area of an artery is circular, therefore we swap out A with the formula π r2.
Q= 33 cm/s x 3,14x (0.2cm)²
Q= 33cm/s x 0.1256cm²/s
Q= 4.1448cm³/s.
There is a flow at 4.1448cm³/s.
Now, using the flow rate (Q), we may
V= 4.1448 cm³/s x 20s
V= 82.896cm³.
82.896cm3 of fluid travels through the artery every 20 seconds.
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an elevator is moving down at a constant rate of 4 m/s. a person is standing on ascale that says the person weighs 80 n. when it reaches the bottom, it comes to a stop in 2 seconds. during the stopping process, what is the reading on the scale? (a picture of what is happening during the stopping of the elevator will help.)
The reading on the scale is 96.31 N.
What is meant by reading on the scale?The Reading Scale describes how people progress through the difficult process of learning to read. It provides teachers with methods for viewing and analyzing their observations of children's developing reading skills, knowledge, and comprehension.
When the elevator stops, its speed decreases from 4 m/s to 0 m/s.
This suggests a slowing down. The amount of force being applied to the
F= mass times acceleration
Assuming the deceleration is constant, we have the following equation:
V = U + at
Where V = Final speed = 0
U = initial speed = 4
a = acceleration
t = time
Solving, we get:
0 = 4 + 2a
a = -2 m/s^2
Solving, we get:
0 = 4 + 2a
a = -2 m/s^2
Thus the object decelerates at 2 m/s^2
The mass of the person = 80 / 9.81 = 8.155 kg
F = 8.155 * 2
F = 16.31 N
Weight in total: 80 + 16.31 = 96.31 N (This is the reading on the scale).
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a 10-kg object is on a table, the coefficient of static and kinetic friction between the object and the table is 0.4 and 0.2, respectively. calculate the frictional force applied on the object if a horizontal force of 50n is applied on the object? (free-fall acceleration g
The frictional force applied on the object if a horizontal force of 50N is applied on the object is 19.6 N
N = m g
N = Normal force
m = Mass
g = Acceleration dur to gravity
m = 10 kg
g = 9.8 m / s²
N = 10 * 9.8
N = 98 N
f = μ N
f = Frictional force
μ = Co-efficient of friction
For static friction,
μ = 0.4
f = 0.4 * 98
f = 39.2 N
For kinetic friction,
μ = 0.2
f = 0.2 * 98
f = 19.6 N
Since Applied force of 50 N is greater than the static frictional force of 39.2 N, the frictional force acting on the object is frictional force.
Therefore, the frictional force applied on the object is 19.6 N
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why do massive stars collapse after they have fused silicon to make nickel, which then decays to make iron in their cores?
The sudden cessation of energy generation causes the core to collapse and the star's outer layers to collapse onto the core.
What is core collapse?
Core-collapse supernovae are spectacular explosions that occur at the end of a big star's thermonuclear evolution, giving rise to neutron stars and black holes. They are among the most intense occurrences in the universe, play an important role in the synthesis and distribution of chemical elements, drive the development of new stars, and are closely tied to an enigmatic subclass of gamma-ray bursts. As a result, astro-physicists are keen to learn which stars burst as supernovae, what physical mechanisms produce the explosion, and what observable effects result from these cataclysmic events.
When the explosion wave generated in the optically obscured stellar centre eventually reaches the surface layers of the star, the visual supernova outburst begins.
The fire ceases because iron does not work as a fuel. The sudden cessation of energy output leads the core to collapse and the star's outer layers to collapse onto the core. The infalling layers compress so quickly that they 'bounce' off the iron core at near-lightspeed.
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at what point along its length must the wire be cut so that the resistance of one piece is 4.0 times the resistance of the other?
The wire must be cut at a length of l/5 along its length so that the resistance of one piece is four times the resistance of other.
The relation between the resistance the resistivity the area and the length of the wire is given by,
R = pl/A
p is resistivity,
A is the area,
l is the length of the wire.
Let us say that the peace of length X is cut from the wire,
So, length of one piece is x and of the other is (l-x)
The resistance of the bigger price has to be four times of the other.
So, we can write,
px/A = 4p(l-x)/A
x = 4l-4x
5x = l
x = l/5.
So, the wire should be cut at a point l/5 from one of the ends of the wire.
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Heyyyy...Please i need helppp
anticlockwise = clockwise (Force*distance)
1 * 20 = 2 * x
x = 10
a long solenoid that has 950 turns uniformly distributed over a length of 0.390 m produces a magnetic field of magnitude 1.00 10-4 t at its center. what current is required in the windings for that to occur? ma
current is required in the windings for that to occur is 32.67mA
N=950
L=0.390m
B=1.0×10⁻⁴
B=μ₀ni
n=N/L(number of turns per unit length)
i=current
μ₀=permeability of free space =4π×10⁻⁷mkgs⁻²A⁻²or4π×10⁻⁷Tesla-m/A
i=B/μ₀n
i=1.0×10⁻⁴×0.390/4π×10⁻⁷×950
i=32.67mA
Electric current is a flow of charged particles—such as electrons or ions—that moves through a conductor for electricity or into void space. It is measured by the net rate of electric charge passing through a surface or into a control volume. Moving particles, or charge carriers, can be any number of distinct kinds of particles depending on the conductor. The charge carriers in electrical circuits are frequently electrons moving down a wire. In semiconductors, they could be electrons or holes. Ions are the charge carriers in an electrolyte, and plasma, an ionized gas, is composed of both electrons and ions.
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two sounds waves are traveling through an opera house. one wave was produced by a soprano, while a baritone produced the other. which sound wave travels faster?
The speed of each wave is identical. The only factor that affects how fast sound travels is the property of the medium.
What is sound wave?An example of an energy type that propagates through a medium using adiabatic loading and unloading is acoustic waves. Acoustic pressure, particle velocity, particle displacement, and acoustic intensity are crucial parameters for defining acoustic waves. Because the air molecules oscillate back and forth as the sound travels, we refer to sound as a wave. The way the air behaves is similar to a compression or longitudinal wave on a spring.
A sound wave is a pressure wave, which can be conceptualized as variations in pressure over time. Transverse waves include sound waves. The tines of a tuning fork must transfer air from the fork to one's ear in order for one to hear the sound of the fork.
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What is the direction of net force at all points in the projectile's path?
The direction of net force at all points in the projectile's path is downwards towards the ground.
F = m a
F = Force
m = Mass
a = Acceleration
F ∝ a
The direction of net force is influenced by the direction of acceleration.
In a projectile motion, if the air resistance is considered negligible, there will be no acceleration in horizontal direction. Because, there will be no forces acting in horizontal direction. The only force acting on the projectile is the force of gravity. Gravity pulls the object downwards throughout its motion. So the direction of net force will be downwards at all points in the projectile's path.
Therefore, the direction of net force at all points in the projectile's path is downwards towards the ground.
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In 1924, edwin hubble proved that the andromeda galaxy lay far beyond the bounds of the milky way, thereby putting to rest the idea that it might have been a cloud within our own galaxy. What key observation enabled him to prove this?.
The key observation was observing individual Cepheid variable stars in Andromeda and applying the period-luminosity relation.
Edwin Powell Hubble was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology.
In 1924, Edwin Hubble proved that the Andromeda Galaxy lay far beyond the bounds of the Milky Way, thus putting to rest the idea that it might have been a cloud within our own galaxy. This all he has done by observing individual Cepheid variable stars in Andromeda and applying the period-luminosity relation.
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a 1362 kg ore cart is rolling at 7.80 m/s across a flat surface. a crane dumps 367 kg of ore (vertically) into the cart. how fast does the cart move after being loaded with ore? assume that frictional forces may be neglected.
6.1m/s is correct answer.
What is frictional force?
Frictional force is defined as the force that opposes motion when one body's surface comes into contact with the surface of another. Friction force reduces a machine's mechanical advantage, or the ratio of output to input. An automobile uses about one-quarter of its energy to restrict friction force, but friction in the tyres keeps the car on the road, and friction in the clutch allows us to drive.
Friction is one of the most prevalent phenomena in the physical universe, affecting everything from matchsticks to machines to the molecular structures of every simple and complex object.
Frictional force is the opposing force formed when two surfaces attempt to move in the same direction or in opposite directions. A frictional force's primary function is to generate resistance to the mobility of one surface over another. The frictional force is determined by the texture of the body's surface.
According to conservation of momentum
m1u1= (m1+m2)v
m1=1362
m2=367
u1=7.8
v=?
m1u1= (m1+m2)v
1362x7.8 = 1727v
v = 6.1 m/s
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10. A stone falls freely from the top of a tower 250.0 m above the ground. Calculate its
velocity half-way through the fall. [g=10.0 ms 2]
Answer:
50 m/s
Explanation:
Half of its Potential Energy (mgh) will have been converted to Kinetic Energy ( 1/2 mv^2)
1/2 mgh = 1/2 mv^2
gh = v^2
10(250) = v ^2 v = 50 m/s
The velocity of the stone halfway through the fall will be approximately 50.0 m/s.
To calculate the velocity of the stone halfway through its fall, we can use the kinematic equation for free fall
v² = u² + 2as
Where:
v is the final velocity,
u is the initial velocity,
a is the acceleration due to gravity (g),
and s is the distance fallen.
Given that the stone falls freely, the initial velocity u is 0 since it starts from rest.
The distance fallen halfway through the fall can be calculated by dividing the total distance fallen by 2.
s = 250.0 m / 2 = 125.0 m
Plugging these values into equation, now we solve for v:
v² = 0² + 2 × 10.0 m/s² × 125.0 m
v² = 0 + 2500 m²/s²
Taking the square root of both sides to find v:
v ≈ √2500 m²/s²
v ≈ 50.0 m/s
Therefore, the velocity of the stone halfway through the fall is approximately 50.0 m/s.
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a concave mirror of focal length 10 cm forms an upright and diminished image of a real object placed at a distance of 5 cm from the mirror. question 17 options: true false
Answer:The correct statement regarding single convicts made A is false if we don't choose the correct statement. Okay, which is not true. The image is always a virtual coma, erect and small in size, for the single mirror. Real objects regardless of traditions are small. Is it okay? The enemy's position needs to be smaller than the object position if the image is virtual erect. The third option will become the false statement that it will be the answer and the fourth option will give us a virtual object that will give us a real image. We can use a virtual object to give us a real image. It is a real image. The answer to the problem is the option three. Thank you for taking the time to thank me.
Explanation:
A weightlifter lifts a 32 kg barbell a distance of 0.1 m in 0.83 s. How much power is demonstrated by the lift?
Answer:
Explanation:
Work:
A = m·g·h = 32·9.8·0.1 = 31.36 L
Power:
N = A / t = 31.36 / 0.83 ≈ 38 W
what is the average rotational latency of a hard drive rotating at 7,200 rpm or 120 revolutions per second?
The average rotational latency of a hard drive rotating at 7,200 rpm or 120 revolutions per second is 4.16 ms.
What is the average rotational latency?Half as long as it takes the disk to complete a full spin, that is how long the rotational delay is. Rotational speed is the rate at which an object revolves or rotates. It is determined by how many rotations an item completes in a given amount of time, unlike linear speed. Rotational speed is calculated as rotations per unit of time, whereas linear speed is calculated as distance per unit of time.Rotational delay is at its worst at 7200 RPM and is typically half that at 8.33 milliseconds (4.17 ms).Rotational lag on average: 4.16 msTypical search time: 8 msMax seek: 10.5 msTo learn more about rotational latency refer to:
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to what maximum height can water go as it goes into a 3.19-cm-diameter nozzle from a 9.00-cm-diameter fire hose while carrying a flow of 30.5 l/s? ignore drag, and assume that the nozzle points straight up.
Bernoulli's equation formula is a relation between pressure, kinetic energy, and gravitational potential energy of a fluid in a container. The formula for Bernoulli's principle is given as follows: p + 1 2 ρ v 2 + ρ g h = c o n s t a n t.
An object's kinetic energy is the energy it has as a result of motion. Applying force is necessary if we want to accelerate an object. We have to put in work to apply a force. After the work is finished, the object will be moving at a new, constant speed because energy has been transferred to it. The science of fluid mechanics examines how fluids—including liquids, gases, blood, and plasma—behave both at rest and while moving. There are numerous uses for fluid mechanics in astrophysics, chemical and mechanical engineering, and biological systems.
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A worker lifts a 10 kilogram block a vertical height of 2 meters. The work he does on the block is:
Answer:
Work = 196 Joules (1 kg*m^2/sec^2 is 1 Joule)
Explanation:
Work, W, is defined as force. F, times displacement, d.
W = Force*displacement
In the worker's case, the force he/she is struggling against is Earth's gravity's acceleration, g, (9.8 m/sec^2) times the mass, m.
Force = mg
Force = (10kg)*(9.8 m/sec^2) = 98 kg*m/sec^2
Use this force in the work calculation.
W = Force*displacement
The displacement is 2 meters.
Work = (98 kg*m/sec^2)*(2 meters) = 196 kg*m^2/sec^2
1 kg*m^2/sec^2 is 1 Joule
Work = 196 Joules
according to the color code, the number of pairs of conductors in a cable that can be defined without repeating a color combination is?
According to the color code, the number of pairs of conductors in a cable that can be defined without repeating a color combination is 25 pairs
To identify individual conductors in a telecommunications twisted pair cable the 25-pair color code is used. These colours are marked on the conductor's insulation. The primary colours are white, red, black, yellow and violet. The secondary colours are blue, orange, green, brown and slate.
The primary colours are called as tip which is positive and the secondary colours are called as ring which is negative. In the pair only one colour from each group should be used. So the possible combinations are 25 pairs.
Therefore, according to the color code, the number of pairs of conductors in a cable that can be defined without repeating a color combination is 25 pairs
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what are two of the three scales discussed in the text that we can use to measure the power/magnitude of an earthquake?
It is accurate to say that the Mercalli, Richter, and magnitude scales are the three main scales used to measure earthquakes. These three scales were used to gauge the earthquake's seismic waves.
The Mercalli intensity scale rates the power of an earthquake. The largest shock of energy from an earthquake is measured on the Richter scale. The preferred method for calculating earthquake magnitudes is the moment magnitude scale.The moment magnitude scale, which measures magnitude (M), or size, and the Modified Mercalli scale, which measures intensity, are the two scales that are most frequently used in the United States today.Seismometer data can be used to estimate an earthquake's timing, position, and magnitude. Seismometers capture the earth's internal vibrations caused by earthquakes. Every seismometer captures the earth movement right beneath it.To know more about Richter
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What is the primary advantage of using phase comparison in an interference microscope?.
The ability to view living cells in their normal form without first killing, fixing, and staining them is one of the primary advantages of phase contrast microscopy in an interference microscope.
It is possible to view and record the dynamics of current biological processes in great clarity and strong contrast with minuscule specimen detail. Phase contrast and differential interference contrast (DIC) microscopy are complementary methods for obtaining highly contrasted pictures of transparent biological phases that often have no impact on the amplitude of visible light waves flowing through the material.
In both situations, the contrast in the DIC pictures is heavily influenced by the orientation of the specimen, but the characteristics of the phase contrast images are unaffected by the rotation of the specimen around the microscope's optical axis.
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how is the energy that powers radio galaxies, quasars, and other active galactic nuclei thought to be produced?
The energy that powers radio galaxies, quasars, and other active galactic nuclei is thought to be produced by accreting matter onto a supermassive black hole. This process is called active galactic nucleus (AGN) fueling.
The gas that surrounds the black hole is heated to millions of degrees as it falls into the black hole. Because the gas is so hot, it emits a great deal of radiation in many different wavelengths.
This radiation can be seen across the electromagnetic spectrum, from low-energy gamma rays to high-energy X-rays. In some cases, jets of charged particles are ejected at nearly the speed of light along magnetic field lines; these jets can create shock waves in the surrounding medium that emit radio waves.
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All si units in chapter gravitation, motion, force and laws of motion
..may ik which syllabus u take
a cylindrical resistor of radius 4.5 mm and length 2.0 cm is made of material that has a resistivity of
A cylindrical resistor of radius 4.5 mm and length 2.0 cm is made of material that has a resistivity then current density J is 1.12 × [tex]10^{5}[/tex]
Since P = i^2 r = (J^2) (A^2) R
J = 1/A [tex]\sqrt{P/R}[/tex]
Current density (J) = 1.12 × [tex]10^{5}[/tex]
A material's electrical resistivity, also known as specific electrical resistance or volume resistivity, is a key characteristic that quantifies how effectively it resists electric current. A substance that permits electric current to flow easily has a low resistance. The Greek letter is often used to signify resistivity (rho). Ohm-meters (m) are the metric unit for electrical resistivity. For instance, the resistivity of a material is 1 m if it has sheet contacts on two of its opposing faces and has a 1 resistance between them.
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if a block of material has a mass of 16 grams and a volume of 8 cubic centimeters, what is its density?
If a block of material has a mass of 16 grams and a volume of 8 cubic centimeters, then density is 2 grams per cubic centimeter.
Density = mass / volume
Density = 16/8 = 2 grams per cubic centimeter.
The substance's mass per unit of volume is its density (also known as specific mass or volumetric mass density). The Latin letter D can also be used to represent density, however the most common symbol is (the lower case Greek letter rho). According to mathematics, density is determined by dividing mass by volume, where denotes the density, m denotes the mass, and V denotes the volume. Although it is incorrect scientifically - this amount is more precisely known as specific weight – in some circumstances (for example, in the US oil and gas business), density is roughly described as its weight per unit volume.
Density and mass concentration have the same numerical value for a pure substance. Varied materials often have different densities, therefore purity and buoyancy may both be affected by density.
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how many elements are pictured a.7 b4 c.3 d2
The number of elements pictured in the above image is 3 (option C).
What are elements?Element are any one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.
There are about 118 chemical elements, each with its own type of atom. Everything in the universe contains the atoms of at least one or more elements. The periodic table lists all the known elements, grouping together those with similar properties.
According to this question, elements are represented by different colours. Each colour represents each element.
The three colours are as follows:
Red Blue BlackThis means that there are three elements in the above image.
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According to the first law of thermodynamics, work done by a system will cause _________ in the internal energy, assuming that no heat is transferred to or from the system.
According to first law of thermodynamics, work done by system will cause a decrease in internal energy, assuming that there is no heat is transfer to or from the system.
What is the first law of thermodynamics ?The first law of thermodynamics explains that energy can neither be created nor destroyed, only be changed from one form to another.
The law states that the energy entering the system in the form of heat is equal to the sum of the increase in the internal energy of system and the energy leaving the system is in the form of work done by the system on surroundings.
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a long wire, parallel to the ground, carries a current toward the east in a magnetic field that is directed due south. what is the direction of the magnetic force on the wire?
A network of metal wires that allows the simultaneous transport of several bits of data Serial cables, which transport data one bit at a time, have mostly replaced parallel wires.
How do parallel wires work?In this tutorial's direct current circuit, there are two parallel straight wires (in red). These wires can be set up in a parallel circuit or in a series circuit, as they are when this tutorial first begins. In a series circuit configuration, a connecting wire joins parallel wires to form a circuit that directs current along a single path. Because of this, the current moves in one direction down one wire and the opposite direction down another wire.By selecting the radio button, you can convert this to a parallel circuit.In a parallel circuit, when the current reaches the parallel wires, it splits in two, with some current flowing down one wire and the other.The direction of travel for the current down both wires is the same.Observe how the parallel wires function in each of these configurations.
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when spiking a volleyball, a player changes the velocity of the ball from 4.2 m/s to the right to 24 m/s to the left along a certain direction. if the impulse delivered to the ball by the player is 9.3 kg m/s to the left, what is the mass of the ball?
Mass of the given volleyball was 0.32 kg.
What is delivered impulse?Impulse is a measure of instantaneous change. The total momentum of an object is determined from the total change in object mass and object velocity.
Since momentum is equal to the delivered impulse,
J = m (v- u)
Where,
J = impulse delivered (-9.3kg m/s)
u = Initial speed of the ball (4.2 m/s)
v = Final speed of the ball (-24 m/s)
m = mass of the object
-9.3 = m (-24 - 4.2)
-9.3 = m × -28.2
m = 9.3 ÷ 28.2
m = 0.32 kg
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A caterpillar tries to climb straight up a wall two meters high, but for every 2 cm up it climbs, it slides down 1 cm. Eventually, it reaches the top. When it reaches the top, it does not pull itself over so it will slide down 1 cm. At this point, the caterpillar was exhausted and fell to the ground. What is the total displacement?
In the first box, select the total displacement. In the second box, indicate the direction whether up, down or n/a.
It is to be noted that the total displacement is 0cm. Note that displacement is different from distance traveled.
What is displacement in Physics?Displacement is described as the total change in an object's location as well as the direction of motion.
The formula is given as:
Displacement = Final position – initial position = change in position.
Given that the caterpillar falls back to the ground, it means that the total displacement is zero.
Final Position = 0
Initial position = 0
Displacement, thus = 0-0 =0
When distinguishing between displacement and distance, we know that distance is the total length of the path between any two places.
Displacement is defined as the direct length between any two places measured via the shortest path between them.
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