How fast is the ball moving when it hits the concrete surface? (Ignore air resistance.)

A. \(5 \mathrm{~m} / \mathrm{s}\)

B. \(7 \mathrm{~m} / \mathrm{s}\)

C. \(25 \mathrm{~m} / \mathrm{s}\)

D. \(50 \mathrm{~m} / \mathrm{s}\)

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 \(6 \mathrm{~mm}\).