A wagon is rolling forward on level ground. Friction isnegligible. The person si

Question

A wagon is rolling forward on level ground. Friction isnegligible. The person sitting in the wagon is holding a rock. Thetotal mass of the wagon, rider, and rock is 94 kg. The mass of therock is 0.34 kg. Initially the wagon is rolling forward at a speedof 0.51 m/s. Then the person throws the rock with a speed of 15m/s. Both speeds are relative to the ground. Find the speed of thewagon after the rock is thrown (a) directlyforward in one case and (b) directly backward inanother.

(a) v = m/s
(b) v = m/s

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