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 ball of mass 0.400kg that is traveling horizontally at 11.0m/s . Your mass is 75.0kg .

Part A

If you catch the ball, with what speed do you and the ball move afterwards?

5.84

  cm/s

I need part B

Part B

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

5.84

  cm/s

Explanation / Answer

Apply law of conservation of momentum

mv1+Mv1 = mv2 +Mv2

0.4 *11 + 75*0 = 0.4 *(-8) + 75 *v2

v2 = (4.4 +3.2)/75

v2= 0.1013 m/s

v2= 10.13 cm /s

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