Velma is in a train moving eastward at 70 m/s. She throws a ball toward the rear of the train, throwing it at her normal "throwing speed" of 20 m/s. The ball's velocity relative to Mort, who is standing beside the tracks, is
A) 50 m/s westward.
B) 90 m/s eastward.
C) 20 m/s eastward.
D) 20 m/s westward.
E) 50 m/s eastward.

Question

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The Answer of Velma is in a train moving eastward at 70 m/s. She throws a ball toward the rear of the train, throwing it at her normal "throwing speed" of 20 m/s. The ball's velocity relative to Mort, who is standing beside the tracks, is
A) 50 m/s westward.
B) 90 m/s eastward.
C) 20 m/s eastward.
D) 20 m/s westward.
E) 50 m/s eastward.

Velma Is in a Train Moving Eastward at 70 M/s