A 49.4 kg swimmer is standing on a stationary 214 kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +3.60 m/s relative to the shore. Calculate the magnitude of the recoil velocity that the raft would have if there were no resistance due to the water.
physics - drwls, Thursday, January 19, 2012 at 11:50pm
Use the fact that total momentum remains zero.
49.4 * 3.60 + 214 * Vraft = 0
Solve for Vraft
The negative sign will mean it goes backwards.