1. The problem statement, all variables and given/known data A superball with a mass of 83.6 g is dropped from a height of 3.1 m. It rebounds to a height of 2.5 m. The acceleration of gravity is 9.8 m/s2. What is the change in its linear momentum during the collision with the floor? Answer in unit of kg m/s. 2. Relevant equations P=mV P=momentun m=mass V=velocity changing P = F X changing time. 3. The attempt at a solution the question asks the momentun during the collision with the floow, so P=mV we know the m is 83.6 g . and do not know the velocity. How do i get the velocity with above known vaule?