Chapter 11.1, Problem 10SSC

To determine

Application of work energy theorem in lifting a bowling ball from a storage rack to the shoulder.

Answer to Problem 10SSC

Work done by gravitational force of earth and by you on the bowling ball must be zero.

Explanation of Solution

Kinetic energy of bowling ball when it was not moving was zero it means when the ball was near the shoulder or when it was in storage rack, that time its kinetic energy

$KE=\frac{m{v}^2}{2}=\frac{m\times 0}{2}=0$

Hence, the work done by gravitational force of earth and by you on the bowling ball must be zero.

Conclusion:

Work done by gravitational force of earth and by the individual on the bowling ball must be zero.