You are standing on a sheet of ice that covers the footballstadium parking lot i

Question

You are standing on a sheet of ice that covers the footballstadium parking lot in Buffalo; there is negligible frictionbetween your feet and the ice. A friend throws you a 0.400kg ballthat is traveling horizontally at 10.0m/s. Your mass is70.0kg. If you catch the ball, with what speed do you and the ballmove afterwards? If the ball hits you and bounces off your chest, so thatafterwards it is moving horizontally at 8.00m/s in the oppositedirection, what is your speed after the collision? You are standing on a sheet of ice that covers the footballstadium parking lot in Buffalo; there is negligible frictionbetween your feet and the ice. A friend throws you a 0.400kg ballthat is traveling horizontally at 10.0m/s. Your mass is70.0kg. If you catch the ball, with what speed do you and the ballmove afterwards? If the ball hits you and bounces off your chest, so thatafterwards it is moving horizontally at 8.00m/s in the oppositedirection, what is your speed after the collision?

Explanation / Answer

From law of conservation of momentum mvi = (m + M) vf the velocity vf = mvi / (m + M ) = (0.4) (10)/ (0.4+70) = 0.0568 m/s again mvi = m vf + M v then      v = m (vi - vf ) / M= (0.4) (10 -8 ) / 70 = 0.011 m/s

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