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December 19, 2014

Homework Help: Physics

Posted by Elizabeth on Monday, October 22, 2012 at 8:40pm.

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 92.5 kg. The mass of the rock is 0.310 kg. Initially the wagon is rolling forward at a speed of 0.550 m/s. Then the person throws the rock with a speed of 17.0 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rock is thrown directly forward.
Answer in m/s.

Find the speed of the wagon after the rock is thrown directly backward.
Answer in m/s.

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