question_answer

  When small boy is trying to push a heavy stone, mention various forces acting on the stone.

Answer:

                  The various forces acting on the stone are: (a) The gravitational force exerted by the earth which pulls the stone downwards. (b) The force of reaction exerted by the ground on the stone vertically upwards. (c) The force of pushing exerted by the boy. (d) The force of friction exerted by the stone. When a small boy tries to push a heavy stone, then all these forces are balanced, and therefore the stone does not move.