Question

Two objects of masses 50 g and 100 g are moving along the same line and direction with velocities of 5 m/s and
10 m/s respectively. They collide and after collision, the second object moves at a velocity of 8 m/s. Determine
the velocity of the second object.

Answer 1

Answer:

M1 v1 + M2 v2 = M1 V1 + M2 V2

Assuming we are to fine V2  (the problem is not clear on this point)

50 * 5 + 100 * 10 = 50 * 8 + 100 V2    conservation of momentum

V2 = (250 + 1000 - 400) / 100 = 850 / 100 = 8.5 m/s