Olaf is standing on a sheet of ice that covers the football stadium parking lot

Question

Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 that is traveling horizontally at 11.3 . Olaf's mass is 70.9 .
If Olaf catches the ball, with what speed do Olaf and the ball move afterward?
Vf=6.34 cm/s
If the ball hits Olaf and bounces off his chest horizontally at 9.00 m/s in the opposite direction, what is his speed after the collision? express in cm/s

Explanation / Answer

a) initial momentum = final momentum (0.400 kg)(11.6 m/s) = (68.1 + 0.400 kg)(v_f) v_f = +0.0677 m/s b) (0.400 kg)(11.6 m/s) = (68.1 kg)(v_f) + (0.400 kg)(-8.80 m/s) v_f = +0.120 m/s

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