Question

. If a box is lying in the compartment of an accelerating train and box is stationary relative to the train. What force cause the acceleration of the box?
(a) Frictional force in the direction of train
(b) Frictional force in the opposite direction of
train
(c) Force applied by air
(d) None of the above

Answer 1

frictional force in the opposite direction of train

Answer 2

The answer is (a) Frictional force in the direction of the train.

• If a box is lying in the compartment of an accelerating train and the box is stationary relative to the train.
• The forces acting on the box lying in the compartment of the moving train would be the weight of the box, the frictional force between the bottom surface of the box and the floor of the train.
• The train is accelerating in the forward direction, hence keeping the box stationary to the train.
• So, the force must be supplied in the direction of the train