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

Question

A wagon is rolling forward on level ground. Friction is negligible.The person sitting in the wagon is holding a rock. The total massof the wagon, rider, and rock is 95.5kg. The mass of the rock is 0.250 kg.Initially the wagon is rolling forward at a speed of 0.520 m/s. Then the person throws the rock with aspeed of 14.5 m/s. Both speeds arerelative to the ground. Find the speed of the wagon after the rockis thrown directly forward.
1 m/s

Find the speed of the wagon after the rock is thrown directlybackward.
2 m/s

Explanation / Answer

allm's *vi = (m1v1f) +(m2v2f) 95.5kg*.52m/s = .25*14.5 + 95.25 *vf vf = .483m/s allm's *vi = (m1v1f) +(m2v2f) 95.5kg*.52m/s = .25*-14.5 + 95.25 *vf vf = .559m/s Hope that helps vf = .559m/s Hope that helps

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