A train travels due east at 25 m/s relative to the ground
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A train travels due east at 25 m/s relative to the ground. A passenger inside the train throws a baseball straight forward at 10 m/s relative to the train. Three observers watch the ball:
I. The passenger sitting next to the thrower.
II. A person standing on the station platform.
III. A jogger running due east at 5 m/s relative to the ground.
Rank the magnitude of the ball’s velocity as measured by observers I, II, and III from greatest to least. Give your answer in the form I > II > III, etc.