Saturday
September 20, 2014

Homework Help: physics

Posted by kate on Saturday, October 1, 2011 at 12:24am.

a superball of mass .125 kg is dropped onto a concrete floor from a height of 1m it bounces back at a height of .9m. What is the net force acting on the ball before and after its released? Work done by the net force while the ball is falling until just before it hits the floor. What is the change in potential energy during the fall? What is the kenetic energy of the ball just before it hits? Find the potential energy of the ball at the top of its bounce? How much mechinical energy is lost during the bounce? The the momentum of the ball just before it hits the floor? find the momentum of the ball just after it leaves the floor on the return bounce. What is the impulese delivered to the floor by the ball? What is the impulse delivered to the ball by the floor?

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