Homework Help: physics

Posted by Amelia on Monday, December 19, 2011 at 3:58pm.

When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). The racket exerts a force of 560 N on the ball for 5.00 ms, giving it a final velocity of 45.0 m/s. Using these data, find the mass of the ball.

physics - Damon, Monday, December 19, 2011 at 6:16pm
F = m a = (change in momentum/ change in time)

560 = m (45 - 0) / 5 *10^-3

560 = 45,000 m /5 = 9,000 m
m = .0622 Kg = 62.2 grams

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