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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 95.0 kg.  The mass of the rock is 0.300kg.  Initially the wagon is rolling forward at a speed of 16.0m/s.  Both speeds are relative to the ground.  Find the speed of the wagon after the rock is thrown directly forward in one case and directly backward in another. 

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  • Category:- Physics
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