Question

a ball is dropped from h height and it takes t time to reach the ground. it bounces back with e Find time taken by ball to come to rest?​

Answer 1

Answer:

h=5m

e=

2

1

Let, t be the time taken by ball to fall from height h and t

′

be the time taken by ball to come to rest.

The time taken by ball to fall from height h is

t=

g

2h

t=

10

(2)(5)

t=1sec

Now, the time taken by ball to come to rest is

t

′

=t[

1−e

1+e

]

t

′

=(1)

⎣

⎢

⎢

⎡

1−

2

1

1+

2

1

⎦

⎥

⎥

⎤

t

′

=

2

1

2

3

t

′

=3sec