PHYSICS 5A Final: PHYSICS5A Final Exam Solution
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Answers: a girl of mass 55kg throws a ball of mass . 8 kg against a wall. the ball strikes the wall hrizontally with a speed of 25 m/s, and it bounces back with this same speed. The ball is in contact with the wall 0. 05 s. what is the avergage force exerted on the wall by the ball. 800 n: a person stands on the edge of a cliff. She throws three identical rocks with the same speed. Rock x is thrown vertically upward, rock y is thrown horizntally, and rock z is thrown vertically downward. The answer they all hit the ground with the same speed: in the figure, determine the character of the collision. The masses of the blocks, and the velocities before and after are given. Complete inelastic: a 5kg ball collides head on with a 10 kg ball, which is initially stationary.
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