Lessons

Eamcet Physics
1 st Year : Unit 4.1( Work-Power And Energy ) - Work-Power And Energy

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Q.

A ball is projected vertically down with an initial velocity from a height of 20m on to a horizontal floor. During the impact it loses 50% of its energy and rebounds to the same height. The velocity of projection is (g = 10ms-2)

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Correct choice: A

Explanation:

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