Asked by jisung park

a pair of identical pucks move towards either other on a frictionless surface with equal speeds, the pucks move apart after colliding. during interaction 3/4 of energy is lost. what is the ratio (momentum of before collision)/(momentum of after the collision)?
Answered by Anonymous
One.
If there are no external forces on the two puck system, there is no change in the total momentum. (Even if it approaches 0/0 )