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Conservation of Momentum

A ball of mas...

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A ball of mass 20 g dropped over a large horizontal surface from a height of 5 m, collides elatically with the surface. If the collision lasts for 10^{-2} s, which of the following statement is true? (g=10 m/s^2) (1) The impulse imparted to the ball is 0.4 n-s (2) Force applied by the ball on the flower is 50 N (3) The impulse imparted to the ball is 0.2 N-s (4) Force exerted by the surface on the ball is 0.2 N

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