Question

A body standing near the edge of a cliff 125 m above a river throws a stone downward with a

speed of 10 ms-1 Find : with what speed will the stone hit water and how long will it take to

descend ?

23 A​

Answer 1

Explanation:

d=125m

u=0m/s

v=10m/s

g/a=9.8m/s²

therefore....

s=ut+1/2gt²

=)125=0×t+1/2×9.8×t²

=)125=4.9t²

=)t²= 125/49×10

=)t²=25.51

=) time=√25.51

time taken is 5.05 seconds

hope it helps...

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