Question

a block of mass 8kg moving with the speed of 4 m/s collides elastically with an identical blocks kept at rest. What will ne the final velocity achieved by the block which was initially kept at rest

Answer 1

Answer:

Conservationoflinearmomentum

8v=2v

1

+8v

2

anddefintionofcoefficientofRestitution

v−0

v

2

−v

1

=−1⇒v

2

−v

1

=−v

solvingtheseequationsweget

v

2

=0.6v

finalKE=

2

1

m(0.6v)

2

=0.36KE

Answer 2

Explanation:

4kg velocity acheived by the block which was intially kept at rest