# physics

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A tennis ball of 60g is dropped from a height of 2.0m,It rebounds but loses 25% of its kintic energy as thermal energy.Ignoring air resistance,calculate
(1)the kinetic energy of the tennis ball when hits the ground.
(2)the height reached on the ground

• physics -

(1) Before or after bouncing?

(2) How can the ball reach a height while on the ground?

The ball has a kinetic energy equal to M*g*H just before bouncing

• physics -

hkgfffc

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