Question

When you push a heavy object, it doesn’t move. Explain the reason in terms of net force.

Answer 1

Push a heavy object which is kept on a floor with some force to move horizontally .But the object does not move because there is a frictional force which is equal and opposite to the applied force on object.
Here net force on object is zero.
Applied force= - Frictional force.
netforce= F + F r( due to friction) = 0
if net force acting on an object which is at rest is zero, then the body does not move . It remains in rest position.