Question

Which is a situation where two hockey pucks could have equal but opposite momentums? Assume that the ice is a frictionless surface.

A. if the hockey pucks weigh the same.

B. if the hockey pucks exert the same force on each other in the same direction while traveling at the same speed.

C. if the hockey pucks are traveling at the same speed, bounce off each other, and move in the opposite direction.

D. if the hockey pucks have the same mass.

Answer 1

As momentum is mass * velocity,
it has to be C, assuming their masses are the same. As the momentum would be equally distributed as momentum must be conserved( because none is lost to friction on the ice).