A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 97.4 kg. The mass of the rock is 0.267 kg. Initially the wagon is rolling forward at a speed of 0.471 m/s. Then the person throws the rock with a speed of 15.8 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rock is thrown (a) directly forward in one case and (b) directly backward in another.

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Q: A 4.00 g bullet has a muzzle velocity of 260 m/s when fired by a rifle with a weight of 35.0 N.   If…

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Q: A 4.00 g bullet has a muzzle velocity of 290 m/s when fired by a rifle with a weight of 35.0 N.…

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