A billiard ball moves with 3 kg x m/s of momentum and strikes three other billiard balls. What is the total momentum of the balls after the collision?
A. 3 kg x m/s
B. more than 3 kg x m/s
C. less than 3 kg x m/s
D. It depends on the mas of each ball
The total momentum of a system of objects is always conserved in a collision. Since the billiard ball has a momentum of 3 kg x m/s before the collision, the total momentum after the collision will also be 3 kg x m/s.
Therefore, the correct answer is A. 3 kg x m/s.