JEE Main Physics question

Physics Motion in a Straight Line JEE Main

A ball falls from a 20 m height onto a floor and rebounds to 5 m. The time of contact is 0.02 s. Find the acceleration during impact. [Manipal 2008]

(A)1200 ms⁻²
(B)1000 ms⁻²
(C)2000 ms⁻²
(D)1500 ms⁻²Correct

Answer: (D)

Solution

Speed just before impact (downward) = √(2g×20) = 20 ms⁻¹. Speed just after impact (upward) =

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Question ID VK-152854