At the moment when a shot-putter releases a 7.26-kg shot, the shot is 2.0 m above the ground and travelling at 15.0 m/s. It reaches a maximum height of 8.0 m above the ground and then falls to the ground. Assume that air resistance is negligible. (a) What is the gravitational potential energy of the shot as it leaves the hand, relative to the ground? (b) What is the kinetic energy of the shot as it leaves the hand? (c) What is the total mechanical energy of the shot as it leaves the hand?
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At the moment when a shot-putter releases a 7.26-kg shot, the shot is 2.0 m above the ground and travelling at 15.0 m/s. It reaches a maximum height of 8.0 m above the ground and then falls to the ground. Assume that air resistance is negligible.
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(a) What is the gravitational potential energy of the shot as it leaves the hand, relative to the ground?
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(b) What is the kinetic energy of the shot as it leaves the hand?
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(c) What is the total mechanical energy of the shot as it leaves
the hand?
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(d) What is the total mechanical energy of the shot as it reaches
its maximum height?
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(e) What is the gravitational potential energy of the shot at its
maximum height?
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(f) What is the kinetic energy of the shot at its maximum height?
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(g) What is the kinetic energy of the shot just as it strikes the
ground?
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(h) Apply the law of conservation of energy to determine the
final speed of the shot.
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