Pre AP Energy Test

1) A stationary hockey puck has a mass of 0.15 kg. A hockey player uses her stick to apply a 3.9 N force over a distance of 0.76 m. How much work does this force do on the puck?

2) What is the mass of an object moving at a speed of 9 m/s with a kinetic energy of 910 J?

3) A dock worker pushes a 64 kg crate up a 2 m high, 7 m long ramp. Ignoring friction, how much work is done on the crate?

4) Anthony is standing on the top of a building 11 m high holding a 3 kg bowling ball. Mildred dug a 4 m deep hole next to the base of the building. What is the gravitational potential energy of the bowling ball relative to the bottom of the hole?

5) How much energy does it take to accelerate a 31 kg object from rest to 60 m/s?

6) How much energy is stored in a spring with a spring constant of 120 N/m if the spring is compressed a distance of 0.3 m from its free length?

7) An object 9 m off the ground has 160 J of gravitational potential energy. How much gravitational potential energy does it have relative to the bottom of a hole 2 m deep?

8) A 18 kg ball is thrown straight upwards with a speed of 43 m/s. What is the maximum height the ball reaches?

9) A 390 kg roller coaster starts from rest at a height of 33 m. What is its speed when it is 25 m off the ground?

10) Dennis drops a quarter from a skyscraper with floors spaced 4 m apart. If the quarter hits the ground at 41 m/s, then how many floors above ground is Dennis? (Ignore air drag.)

11) What is the minimum force required to increase the energy of a car by 140 J over a distance of 43 m? Assume the force is constant. Pre AP Energy Test

12) A vertical spring with k = 1100 N/m is compressed 0.6 m. A 3.1 kg ball is placed on top of the spring and released. How far above its starting point is the ball when it has a speed of 3 m/s?

13) George does 29 joules of work to lift a 5 kg box at a constant speed. If he drops it, how fast will the box be going when it hits the ground?

14) A 1 kg ball is placed on a vertical 830 N/m spring that is compressed 35 cm. When the spring is released, how high above its starting point will the ball go?

15) A horizontal spring is compressed 0.18 m and has a spring constant of 800 N/m. If this spring is used to launch a 2 kg ball, what is the velocity of the ball just as it leaves the spring?

16) A 6 kg ball rolls off of a 4 m high cliff traveling at 20 m/s. If it lands directly on top of an unstretched spring with a spring constant of 55 N/m, how far does it compress the spring?

17) A 61 kg stone falls from the top of a 690 m cliff. Neglecting friction, how fast will the stone be moving just as it hits the ground?

18) A 5 kg ball is dropped from a height of 30 m. What is its speed when it is 25 m off the ground?

19) Hutch did 12 joules of work lifting his kg dog bone 1 meter off the ground. If he drops it, how fast will it be traveling when it is .2 meters from the ground?

20) A 5kg object is placed on a 1000 N/m spring that is compressed 25 cm. When the spring is released, how fast will the object be travel at the instant it leaves the spring?