When a tennis ball bounces from a racket, the ball loses approximately \(30 \%\) of its kinetic energy to thermal energy. A ball that hits a racket at a speed of \(10 \mathrm{~m} / \mathrm{s}\) will rebound with approximately what speed?

A. \(8.5 \mathrm{~m} / \mathrm{s}\)

B. \(7.0 \mathrm{~m} / \mathrm{s}\)

C. \(4.5 \mathrm{~m} / \mathrm{s}\)

D. \(3.0 \mathrm{~m} / \mathrm{s}\)

A tennis ball bouncing on a hard surface compresses and then rebounds. The details of the rebound are specified in tennis regulations. Tennis balls, to be acceptable for tournament play, must have a mass of \(57.5 \mathrm{~g}\). When dropped from a height of \(2.5 \mathrm{~m}\) onto a concrete surface, a ball must rebound to a height of \(1.4 \mathrm{~m}\). During impact, the ball compresses by approximately \(6 \mathrm{~mm}\).