Question

A ball is falling freely from a
certain height. It reaches
ground after 3 second. If 30
m/s is the velocity of the ball
while touching the ground
then.
calculate is acceleration​

Answer 1

Answer:

At instant initial velocity=0m/s(at the start of fall)

From equation of motion we get,

v

2

=u

2

+2gs

where s=

2

h

v=

10h

Also

v=ut+

2

1

gt

2

t

2

=

10

2

10h

=

10

2

h

t=

10

2

h

s