# Physics Practice Problems: Work and Energy

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Physics Practice Problems: Work and Energy Page 1 of 5 Please ignore air resistance, treat all surfaces as frictionless unless otherwise specified or implied. Work and work-energy theorem: 1. A 2kg crate rests on the floor.

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Physics Practice Problems: Work and Energy
Physics Practice Problems: Work and Energy Page 1 of 5 Please ignore air resistance, treat all surfaces as frictionless unless otherwise specified or implied. Work and work-energy theorem: 1. A 2kg crate rests on the floor.
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Work and Energy 1. If the velocity of a moving object is doubled, the object's kinetic energy is (1)unchanged (3)doubled (2)halved (4)quadrupled 2. Which cart shown below has the greatest kinetic energy? (1) (3) (2) (4) 3. As a block is accelerated from rest along a horizontal surface, its gravitational potential energy (1)decreases (3)remains ...
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How much work is done ... Assume no friction. The mass of the block is 10.0 kg. Since the problem involves a change in height and speed, we make use of the generalized Work­Energy Theorem, WNC = E = P ... surface where it passes over a 2.00­m rough patch.
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Physics Worksheet Work and Energy Section: Name: Mr. Lin 1 Show all work for the following questions, including the equation and substitution with units. 1. An 80 N force has been applied to a block and move it 20 m along the direction of the force. How much work has been done to the block? 2.
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Work Practice Problems Show all work! No naked numbers! 1) Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do? 2) How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200N? 3) Alex applies 350 N of force to move his stalled car 40 m, how much work did Alex do?
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6. Calculate the power expended when a 500 N barbell is lifted 2.2 m in 2 s. 7. An escalator is used to move 20 passengers every minute from the first floor of a department store to the second. The second floor is located 5-meters above the first floor. The average passenger's mass is 60 kg. Determine the power requirement of the escalator in ...
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Work Energy Review . As shown in the diagram below, a child applies a ... As a ball falls freely (without friction) toward the ground, its total mechanical energy A. decreases B. increases C. remains the same . A pendulum is pulled to the side and released from rest.
Name: Date: Physics I H Mr. Tiesler Work, Power & Energy ...
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14. Suppose that you have a mass of 62.0 kg and that you walk to the top of a stairway which is h = 12.0 meters high and L= 15.0 meters deep. a. How much work will you have to do in walking to the top of the stairway? Ans. To get to the top of the stairs, W = F d=mgh = 62.0 kg . . 12 m =7291.2 J b.
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1. The force acting on a particle varies as in the Figure below (The axis is marked in increments of 5.00 m.) x Find the work done by the force as the particle moves across the following distance from = 0 m to . x x = 60.0 m. (90 J) 2. A 2.5 kg object is subject to a force F x that varies with position as in the Figure below. What is the total work
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