Answer to Question #160844 in Physics for Andu

Question #160844

5. A boy weighing 60kg slides on an ice rink at a speed of 4m / s. How fast will the boy slide if he throws a stone weighing 2.5kg horizontally behind him, at a speed of 1.5m / s. Friction is not taken into account.

Expert's answer

"Mv=MV-mu\\\\(60)(4)=(60)V-(2.5)(1.5)\\\\V=4.0625\\frac{m}{s}"

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