A train is moving along a track with constant speed v1 relative to the ground. A person on the train holds a ball of mass m and throws it toward the front of the train with a speed v2 relative to the train.
Part A
Calculate the change in kinetic energy of the ball in the Earth frame of reference.
Express your answer in terms of the variables m, v1, and v2.
Part B
Calculate the change in kinetic energy of the ball in the train frame of reference.
Express your answer in terms of the variables m, v1, and v2.
Part C
How much work was done on the ball in the Earth frame of reference?
Express your answer in terms of the variables m, v1, and v2.
Part D
How much work was done on the ball in the train frame of reference?
Express your answer in terms of the variables m, v1, and v2.
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