Margie and Bill, 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, Margie moving at a constant speed of 6 m/s and Bill moving at 3 m/s. The mass of the Margie is 50 kg, what will be the mass of Bill? O 50 kg 150 kg O 25 kg O 100 kg

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