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 just after it is dropped from the window of a train running at a constant velocity of 36 kmh-1.
Answer» When the stone is dropped from the window of a train running at a constant velocity. no force acts on the stone due to motion of the train. Thus, Force on stone = Mg - 0.98 N (vertically downward)

Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg just after it is dropped from the window of a train running at a constant velocity of 36 kmh-1.

Answer»

When the stone is dropped from the window of a train running at a constant velocity. no force acts on the stone due to motion of the train.

Thus, Force on stone = Mg - 0.98 N (vertically downward)