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 total mechanical energy of the shot as it reaches its maximum height?
(b) What is the kinetic energy of the shot at its maximum height?
(c) What is the kinetic energy of the shot just as it strikes the ground?
(d) Apply the law of conservation of energy to determine the final speed of the shot.
2 answers