Question

two balls of the same size but of different material rubber and iron are kept on the smooth floot of a moving train.the brakes are applied suddenly to stop the train.will the ball start rolling?if so,in which direction? will they move with the same speed?give reason of your answer. please............!​

Answer 1

yes , forword, no ...................

Answer 2

Explanation:

When the brakes are applied, the balls will experience a pseudo force in forward direction.

the magnitude of the pseudo force is given by-

pseudo force = mass of the ball × deceleration

so, acceleration of ball = pseudo force / mass of ball

hence, acceleration of ball = deceleration of train

so, the two balls will attain same acceleration.

the two balls will attain same acceleration.If the balls are initially at rest, then they will move with same velocities in forward direction.

If the surface is smooth i.e. there is no friction, then the balls will never roll. They will only slide on the surface.