1 A ball is bouncing elastically with a speed 1 m s between

Last updated: 6/8/2023

1 A ball is bouncing elastically with a speed 1 m s between walls of a railway compartment of size 10 m in a direction perpendicular to walls The train is moving at a constant velocity of 10 m s parallel to the direction of motion of the ball As seen from the ground a the direction of motion of the ball changes every 10 seconds b speed of ball changes every 10 seconds c average speed of ball over any 20 second interval is fixed d the acceleration of ball is the same as from the train