Give the magnitude and direction of the net force acting on a stone of

1.	Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg lying on the floor of a train which is accelerating with 1 ms-2, the stone being at rest relative to the train. (Neglect the air resistance throughout).
Answer» In this case, weight of the stone is balanced by the normal reaction. The net force on the stone is given by: F = Ma = 0.1 x 1 = 0.1 N (along horizontal)

Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg lying on the floor of a train which is accelerating with 1 ms-2, the stone being at rest relative to the train. (Neglect the air resistance throughout).

Answer»

In this case, weight of the stone is balanced by the normal reaction. The net force on the stone is given by:

F = Ma = 0.1 x 1 = 0.1 N (along horizontal)