During a school sports meet a rubber ball is used for a throwing event
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
During a school sports meet a rubber ball is used for a throwing event.
Study the following situations for the ball:
(i) A ball of mass 0.50kg is thrown such that its kinetic energy at the instant of release is 72J. Calculate the speed with which the ball leaves the thrower’s hand.
(ii) A second ball of the same material but of mass 0.25kg is thrown so that it possesses the same kinetic energy of 72J. Find the speed of this lighter ball.
(iii) Compare the two speeds obtained above and comment on how mass affects the speed required to attain a given amount of kinetic energy.