Question

. A body P of mass 3 kg and moving with velocity of 2 m/s makes a head - on elastic collision vs
other body Q of mass 5 kg, which is at rest.
(1) What is the velocity of Q after collision
(2) What is momentum of body P after collision ?
Ans. 1.5 m/s, - 1.5 kg m/s​

Answer 1

Explanation:

by conservation of momentum

mv=(3+1)v

f

v

f

=

4

v

loss in kinetic energy=

2

mv

2

−

2

4m(

4

v

)

2

=

8

3mv

2

=

4

3

KE

i