52. (II) You drop a ball from a height of 2.0 m, and it bounces back to a height of 1.6 m. (a) What fraction of its initial energy is lost during the bounce? (b) What is the ball's speed just before and just after the bounce? (c) Where did the energy go?

Q: A ball starts from rest from a hill of height 15.0 meters, when the ball gets to the bottom of the…

A: Given Data: Initial velocity of ball is u=0. The height of hill is h=15 m. The time taken is,…

Q: A pogo stick has a spring with a force constant of 2.50 × 104 N/m , which can be compressed 10.4 cm.…

A: M= 38 kg  K= 2.5× 104 N/m  x= 10.4 cm = 0.104 m

Q: If an automobile were to have a 100% efficient engine, transferring all of the fuel’s energy to…

A: The efficiency of automobile is 100 %. This means that the efficiency is 1.

Q: A 8-kg object falls vertically a distance of 5 m. Its potential energy has changed by approximately…

A:

Q: 9.108. For a car weighing 980 kg, how much work must be done to move the car 24 miles? Ignore…

A: First, we must understand what is work done. Work is the energy transfer that happens when an object…

Q: If it requires 6.0J of work to stretch a particular spring by 2.0 cm from its equilibrium length,…

A: Given data: Work done, E=6.0 J Stretch, x1=2.0 cm=0.02 m;  x2=6.0 cm=0.06 m

Q: . A 2-kg block rests on top of a table 80 cm from the floor. Find the potential energy of the block…

A: Mass of block, m = 80 kg To find: Potential energy of the block relative to,  (a) the floor.  (b)…

Q: A 2-kg ball is held 6 m above the ground. Relative to the ground its potential energy is A) 60 J.…

A: Given data:  Mass (m) = 2 kg Height (h) = 6 m Required: Potential energy relative to the ground

Q: A mass of 1 kg is acted upon by a single force, F = (4i + 4j)N. Under this force it is displaced…

A:

Q: A 100 kg object is fired straight up with an initial speed of 200 m/s. Ignore air resistance and set…

A:

Q: An object of mass 10 kg is lifted through a height of 5 m. The increase in Potential Energy of the…

A: potential energy =mgh here  m=10kg  lifted height =5m g=9.8 m/s^2

Q: Can we ignore the kinetic energy of the Earth when considering the energy of a system consisting of…

A: Consider a ball dropping at the surface of the earth. By Newton’s third law, however, the earth will…

Q: The specialty of an athlete on the women's track team is the pole vault. She has a mass of 44 kg and…

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Q: A 60 kg woman whose average power is 30 W can climb a mountain 2.0 km high in

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Q: In the absence of air resistance, a ball thrown vertically upward with a certain initial KE will…

A: When air resistance is a factor affecting the ball, it will return to its original level with the…

Q: If the speed of a particle is doubled, what happens to its kinetic energy?

A:

Q: You push very hard on a heavy desk, trying to move it. You do work on the desk: O whether or not it…

A: As from the definition of work , work on any object is said to be   done when a force acts upon an…

Q: . A car of mass 900 kg is initially travelling at 50 km/h. If the speed increases so that its…

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Q: Give 5 situations in which work is not done on it.

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Q: A 0.80-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of…

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Q: The specialty of an athlete on the women's track team is the pole vault. She has a mass of 48 kg and…

A: Total mechanical energy (Kinetic energy + Potential energy) of a system remains constant if the…

Q: 91. What happens to the kinetic energy of a moving object if the net work done is zero? * O a. The…

A: Introduction: Work done is defined as the product of the force applied and the displacement.

Q: The driver of a passenger car puts the car to "rest" at the speed of 90 km/h, therefore, the car's…

A:

Q: If the velocity of an object doubles, how does this affect the Kinetic energy of the object?

A: Write the expression for the kinetic energy of an object.

Q: A 2.50 kg mass is dropped from rest. If it falls a distance of 25.o m what will its change in…

A: Given  Mass m = 2.5 kg decrease in elevation of mass h = 25 m change in KE ?

Q: A basketball of mass 0.0400 kg is dropped from a height of 5.00 m to the ground and bounces back to…

A: Given data: Mass of the basketball is, m = 0.0400 kg Height from which basketball is dropped on…

Q: A 3-kg crate is moved horizontally by 5 m by a 5-N force with a speed of 4 m/s. If that is, how much…

A: The forces acting on the crate are the applied force in the direction of motion and the frictional…

Q: 20.1f the speed of an object is doubled, its kinetic energy will be (a) halved (b) quartered (c)…

A: According to question we need to find that If the speed of an object is doubled, its kinetic energy…

Q: Which would cause the greatest increase in the kinetic energy of a moving object? Doubling the mass…

A: Let the mass of an object = m  Let the speed of an object = v  Let the kinetic energy of moving…

Q: 7. Consider a ball thrown straight up in the air. At what position is its kinetic energy a maximum?…

A: Let us consider a ball thrown upwards in the air with an initial velocity of 'u' m/s. As the ball is…

Q: The specialty of an athlete on the women's track team is the pole vault. She has a mass of 60 kg and…

A: Mass of the woman is m = 60 kg Approach speed is v1 = 8.7 m/s Her speed when she is directly above…

Q: Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 70 km/h ?

A: Given data:  Mass (m) = 1500 kg Initial velocity (Vi) = 70 km/h Final velocity (Vf) = 0  Required:…

Q: A 58-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is…

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Q: A 2.00 ×102-g particle is released from rest at point A  on the inside of a smooth hemispherical…

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Q: Find the energy possessed by an object of mass 10 kg when it is at a height of 6 m above the ground.…

A: Given: The mass of the object is 10 kg. The height of the object is 6 m above the ground.

Q: 16. (I) (a) If the kinetic energy of a particle is tripled, by what factor has its speed increased?…

A: We know that  K.E. = 12m v2 a)  so if K.E. has increased by 3 times than the velocity factor must…

Q: a mass of 0.1420 kg and has this speed just before a batter makes contact with it, how much kinetic…

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Q: A 6.0-kg block is released from rest 80m above the ground. When it has fallen 60 its kinetic energy…

A: Solution: as given that m =6 kg h = 80 m fallen height s =60 m

Q: a 10.2kg ball is shot out of a canon vertically up the spring (k=18100n/m) in the canon is…

A: a PEspring = 12×k×x2Where k = spring constant = 18100 N/mx = amount of compression relative to…

Q: A basketball of mass 0.0400 kg is dropped from a height of 5.00 m to the ground and bounces back to…

A: The mass of the basketball, m=0.040 kg   The initial height, ∆h=5.0 m   The final height, ∆h'=3.0 m

Q: When a 12 kg object increases its potential energy by 720 J, approximately how has its position…

A: Given  Mass M = 12 kg Potential Energy PE = 720 J

Q: The work necessary to stretch a spring trom 9 in to 10 in is times the work necessary to stretch it…

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Q: You drop two balls from a tower, one of mass m and the other of mass 2m. Just before they hit the…

A: Given: The mass of the first ball is m. The mass of the second ball is 2m. Introduction: The kinetic…