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1. 80 N, moved 20 meters A：1600 J
2. 20 N, moved 3.5 meter A: 70 J
3. 360 kilogram piano, window 10 meters form the ground A: 36000 J
5. 100 N, 30 Degree pulling on 15 kilogram for 5 meters A: 433 J
6. 500 N, LIFTED 2.2 M IN 2 Sec
8. mass of .1 kg, dropped 200 m high,travel with the speed of 40 m/s. how much energy to air drag A: 120 J
HT https://www.helpteaching.com/tesdts/printKey.htm?test=352510
1. releasing a compressed spring is an example of kinetic energy being converted to potential energy
2. pushing a box 100 m with a force of 200 N is the one doing the most work out of the choices
3. A 100-kg rock is 100 m above the ground, what is the potential energy of the rock A: D, 98000 J
4. a basketball sitting on a rack is an example of potential energy
5. A car or truck moving down the highway has (kinetic) energy by virtue of its motion
6. Imagine an object held at some height above the ground. It is released and falls toward the ground. Ignoring air resistance or friction, which of the following must be true?
WORK, POWER, AND ENERGY WORKSHEETS
1. Calculate the work done by a 47 N force pushing a pencil 0.26 m. A: 12 J
2. Calculate the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m against a force of 23 N A: 6 J
3. Calculate the work done by a 2.4 N force pushing a 400. g sandwich across a table 0.75 m wide A: 1.8 J
4. push a 20.0 kg baby carriage, using a force of 62.0 N at an angle of 30.0 Degrees to the horizontal, do 2920 J of work A: 54.4 J
5. How much work is it to lift a 20. kg sack of potatoes vertically 6.5 m A: 1300 J
6. If a small motor does 520. J of work to move a toy car 260. m, what force does it exert A: 2 J
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