1. The problem statement, all variables and given/known data What is the peak force between two pool balls in a pool shot? Estimate the momentum transferred to the object ball in a hard pool shot. Estimate (or look up) masses and velocities. For how long are two pool balls in contact? The time can be approximated by the length of time it takes a sound wave to cross a pool ball. Put it all together and compare it to the force of gravity or hte normal force from the table on each ball. 2. Relevant equations p=mv F=dp/dt 3. The attempt at a solution Estimations: mass of cue ball- .16 kg velocity of cue ball- .7 m/s -->p=.229 kg m/s speed of sound- 340.29 m/s length of cue ball- (2.25 in)(.0254 m/in)=.05715 m -->speed of sound across a cue ball=1.68E-4 s --> F=dp/dt=(.229 kg m/s)/(1.68E-4 s)=1360 N and F_g=mg=(.16 kg)(9.81 m/s^2)=1.57 N The force that I got is WAY too high, but I don't know what I did wrong.