Question

A ball comes down with a speed from building .Just before to hit ground its speed is v2=4gh

Answer 1

Given that the ball is dropped from rest and velocity increases at a rate of 9.81 m/sec every sec:

Velocity at the end of the 1st sec = 9.81 m/sec.

Velocity at the end of the 2nd sec = 9.81 + 9.81 m/sec.

Velocity at the end of the 3rd sec = 9.81 + 9.81 + 9.81 = 29.43 m/sec.

Answer 2

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