A 0.269-kg volleyball approaches a player horizontally with a speed of 13.5 m/s.

Question

A 0.269-kg volleyball approaches a player horizontally with a speed of 13.5 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. (a) What impulse is delivered to the ball by the player? kg

Explanation / Answer

a) By Impulse(I) = ?P = m x ?v = m x [v(final) - v(initial)] =>I = 0.329 x [-22-12.9] =>I = -11.4821 N-s [-ve indicating the direction is opposite to the initial direction of ball]----------- b) By F = ?P/?t = -11.4 /0.06 = -191.36 Newton [-ve indicating the direction is opposite to the initial direction of ball]

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