Question

1.
A body of mass 4kg moves with a velocity of 10m/s collide elastically with
another body of mass 8kg at rest. Then the velocity of 8kg body after collision is
1) 4 m/s
2) 6.67 m/s
3) 10 m/s
4) 12 m/s
A marble going at a speed of 2m/s hits another marble of equal mass at rest, If
the collision is perfectly elastic. The velocity of the first after collision
1) 4
2) O
3) 2
4) 3
​

Answer 1

Answer:

1 option a 4m/s

2 option b 0

2 option