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Ronaldohaving a mass of 75 kgstarts skiing from rest at the top of a hill. He is at a height of 30m from the ground.
Ronaldohaving a mass of 75 kgstarts skiing from rest at the top of a hill. He is at a height of 30m from the ground. By neglecting friction, answer the following questions:
a) | Calculate Ronaldo's gravitational potential energy at the top of the hill relative to the ground. |
(b) | Calculate Ronaldo's total mechanical energy at the top of the hill. |
c) | Calculate Ronaldo's kinetic energy and gravitational potential energy at a height of 15 m from the ground. |
d) | Calculate Ronaldo's speed at the bottom of the hill. |
(e) | Sketch the variation ofRonaldo's total mechanical energy, kinetic energy and gravitational potential energy as a function of height above the groundon the samegraph. Explain your reasoning carefully. | |
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