Question

a ball is gently dropped from a height of 20 metre. If velocity increases uniformly the rate of 10 ms with what velocity will it strike the ground? After what time will it strike the ground?

Answer 1

distance covered by ball=20m
a=10m/s²
u=0
according to third equation of motion
v²=u²+2as
v²=0+2(10)(20)
v=20m/s
according to first equation of motion
v=u+at
20=0+10(t)
t=2second

Answer 2

Hi..

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