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 kg that is traveling horizontally at 10.3m/s . Olaf's mass is 67.7 kg .


Part A
If Olaf catches the ball, with what speed do Olaf and the ball move afterward?
Express your answer numerically in centimeters per second.


Part B
If the ball hits Olaf and bounces off his chest horizontally at 7.40m/s in the opposite direction, what is his speed after the collision?
Express your answer numerically in centimeters per second.

Explanation / Answer

part a]
conservation of momentum
0.4*10.3 =(0.4+67.7) V
V = 0.06 m/s =6cm/s
part B

0.4*10.3 = -7.4* 0.4 + V*67.7
V =0.106 m/s

V =10.6 cm/s

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