Margie (of mass 49 kg) and Bill (of mass 69 kg), both with brand new roller blades, are at rest facing each other in the parking lot. They push off each other and move in opposite directions, with Margie moving at a constant speed of 14 ft/s.
At what speed is Bill moving? Answer in units of ft/s.
At what speed is Bill moving?
Since the momentum that Margie picks up has to be equal to Bill's momentum, set the two equal to each other and solve for the unknown. All you need to do now is find out what the formula for momentum is and plug in the values you know...
dog skin problem
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