Question

If a cue ball in pool has a momentum of .5 kg m/s and it hits the 8 ball which is moving and has a momentum of .1 kg m/s what is the momentum of the two balls if they stick together after the collision?

Answer 1

The momentum of the two balls if they stick together after the collision is 0.6 kgm/s.

Step-by-step explanation:

Apply the principle of conservation of linear momentum, the total momentum before collision is equal to the total momentum after collision.

Given;

initial momentum of the cue ball = 0.5 kgm/s

initial momentum of the 8 ball = 0.1 kgm/s

`P_(before) = P_(after)\\\\0.5 \ kgm/s + 0.1 \ kgm/s = P_(after)\\\\P_(after) = 0.6 \ kgm/s`

Therefore, the momentum of the two balls if they stick together after the collision is 0.6 kgm/s.