A heavy leather ball and a light tennis ball are kept on the floor of a moving train when train is suddenly stop they sit and motion in which direction will they move which one of them will attend higher velocity

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Solution

The balls are kept on the floor of a moving train .
So, when the brakes are applied the balls will move in the forward direction due to inertia of motion.
Since friction is same they will get same force of push.
So, acceleration of the heavy ball will be less as
a = F/m
Hence light tennis ball will attain higher velocity.

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