Question

a ball is dropped from the height of 20m calculate the time taken by the ball to reach the ground , the velocity with which the ball strikes the ground . given: a=10m/s sq

Answer 1

Answer:

2sec

Explanation:

v^2 = u^2+2as

v= √{2#10#20). ( u=0)

= 20m/s

now, v=u+ at

20=O+ 10 # t

t= 20/10sec

=2 sec

v= final velocity at the time of strike

u=initial velocity just before the ball is drop so means it is in hand so O m/s