In a game of cricket

PHYSICS · Multi-part · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power

Problem

In a game of cricket, a fast bowler releases the ball at

140\text{ km h}^{-1}

. The ball has a mass of

160\text{ g}

. Slow-motion cameras show that the ball loses about

15\%

of its kinetic energy during the

15\text{ m}

distance from the bowler to the batsman. (1) Determine the speed of the ball at its release in

\text{m s}^{-1}

. (2) Calculate the work done on the ball by air friction. (3) Calculate the average force of air friction acting on the ball.