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 10.9m/s. Your mass is 73.6kg.

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


• If the ball hits you and bounces off your chest, so afterwards it is moving horizontally at 7.30 m/s in the opposite direction, what is your speed after the collision?

Explanation / Answer

let initial moving direction ball is taken as poistive x initial ball moentum= 0.4* 10.9 final momentum man holds the ball and moves in the same direction as ball should move=( 73.6+.4)*Vf final= initail that gives=Vf= .4*10.9/74= 0.0589m/s case 2 ball hits chest and moves in negative x direction initial ball moentum= 0.4* 10.9 final ball moentum= 0.4* (-7.3) final momentum of man=73.6* vf initail = final 0.4* 10.9=73.6* vf+0.4* (-7.3) Vf= 0.4* (10.9+7.3)/73.6= 0.0989 m/s

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