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17 May, 17:11

1 - a 0.250 kg egg-drop project is at the top of the 14 meter tall stadium. what is the projects potential energy?

2 - Jason has decided to become a jockey. he and his horse have a combined mass of 550 kg, and they are traveling at 15 m/s when they cross the finish line (in first place!) what is their kinetic energy?

3 - a 0.5 kg ball is at the top of a 20 meter tall hill.

a) What is the ball's kinetic energy?

b) what is the ball's potential energy?

c) what is the ball's mechanical energy?

4 - a 2.0 kg toy has been thrown in the air it is 1.5m above the ground and is moving up at 3.0 m/s

a) What is the toy's kinetic energy?

b) what is the toy's potential energy?

c) what is the toy's mechanical energy?

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Answers (1)
  1. 17 May, 17:34
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    1. The potential energy is 34.3J

    2. The kinetic energy is 61,875J.

    3. A 0.5 kg ball is at the top of a 20 meter tall hill.

    a) What is the ball's kinetic energy? The ball's kinetic energy is zero.

    b) what is the ball's potential energy? The ball's potential energy is 98.1J.

    c) what is the ball's mechanical energy? The ball's mechanical energy is 98.1J.

    4. 2.0 kg toy has been thrown in the air it is 1.5m above the ground and is moving up at 3.0 m/s

    a) What is the toy's kinetic energy? The toy's kinetic energy is 9J.

    b) what is the toy's potential energy? The toy's potential energy is 29.43J.

    c) what is the toy's mechanical energy? The toy's mechanical energy s 38.43J.
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