Question

A ball is gently dropped from a height of 20m . If its velocity increase uniformly at the rate of 10 ms-2 , with what velocity will it strike the ground ? After what time will it strike the ground?
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Answer 1

5 m/s

Explanation:

t = √2g/h

= √2(10)/20

=1 s

v = 1/2 g(t)²

= 1/2 (10)(1)²

= 5 m/s