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Posted by on Wednesday, June 24, 2009 at 11:23pm.

A girl of mass 60 kg throws a ball of mass 0.8 kg against a wall. The ball strikes the wall
horizontally with a speed of 11 m/s, and it bounces back with this same speed. The ball is in contact
with the wall 0.05 s. What is the average force exerted on the wall by the ball?

A) 6600 N B) 26,400 N C) 13,200 N D) 180 N E) 350 N

  • physics - , Thursday, June 25, 2009 at 8:55am

    Forcefromwall*time= massball*changeinvelocity.

    Notice the change in velocity is 22m/s (Vf-Vi) where V is vectors, with direction.

  • physics - , Sunday, October 31, 2010 at 9:21pm

    350 N

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