Asked by Donna

A 30 kg girl and a 25 kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girl speed is _______ m/s?
Answered by drwls
The girl's momentum is equal and of opposite sign, so the total momentum remains zero.
30*Vgirl = 25*1.0

Solve for Vgirl
Answered by Laura
0.83 m/s
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