You are standing on a sheet of ice that covers the football stadium parking lot

Question

You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. A friend throws you a 0.400 kg ball that is traveling horizontally at 10.0 m/s. Your mass is 70.0 kg.

If you catch the ball, with what speed do you and the ball move afterwards?
v=______cm/s

If the ball hits you and bounces off your chest, so that afterwards it is moving horizontally at 8.00 in the opposite direction, what is your speed after the collision?
v=______cm/s

Explanation / Answer

a). (m + M)v = mvi v = 0.4*10/(0.4+70) = 0.0568 m/s b) m vi = -m vf + M v v = (m vi + m vf)/M = 0.4*(10+8)/70 = 0.103 m/s

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