Question

Two particles A and B masses 20g and 30g respectively are at rest at certain time . Because of the forces exerted by them on each other, the particles start moving . At a given instant , particle A is found to move towards east with velocity of 6cm/sec. what is velocity of particle B at this instant (in cm/s)?

Answer 1

Use the law of conservation of momentum.
therefore, the initial momentum = final momentum.

Answer 2

Answer:

4 is the answer