Question

When an object with a momentum of 80 kg ´ m/s collides with an object with a momentum of –100 kg ´ m/s the total momentum after the collision is ______.
a.
20 kg x m/s
c.
20 kg x m/s2
b.
-20 kg x m/s
d.
-20 kg x m/s2

Answer 1

This is a physics problem.

The law is that the momentum is preserved: total momentum before collsion = total momentum after collision

Momentum before collision = 80 kg.m/s - 100 kg.m/s = -20 kg.m/s

Then answer is b. - 20 kg.m/s