Question

C3 - IPLH
Weekend test - 12
36. A particle of mass m moving in the x direction with speed 2v is hit by another particle of mass 2m
moving in the y direction with speed v. If the collision is perfectly in elastic, the percentage loss in
the energy during the collision is close to
1) 44%
2) 50%
3) 56%
4) 62%
7. A ball is dropped on to a floor. If the coefficient of restitution is 0.3 the percentage loss of energy
of the ball on rebounding from the floor is
1) 80%
2) 50%
3) 75%
4)91%
5. A ball moving with a certain velocity hits another identical ball at rest. If the plane is frictionless
and collision is elastic, the angle between the directions in which the balls move after collision,
will be
1 1
1) 30°
2) 60
4)120
​

Answer 1

30 degree is the right answer