Question

if you are trying to push a heavy box on the horizontal surface list various forces acting on the box state the condition on which the box will start moving on the surface how will the magnitude of the applied force required to move the box

Answer 1

When h are sliding a box, frictional force,gravitation force and the muscular force u are applying can be seen.The box will start sliding when your force is more than the frictional and other forces.
If the weight of the object increases,then the frictional force increases.So,you will have to apply more force.
If the surface u are dragging ur box becomes even more rough,frictional force increases and so u will have to add more force to move the box.

Less friction=less force
More friction=more force

Answer 2

Explanation:

Forces acting on the box are

1)Frictional 2)Gravitational 3)muscular

if the weight of the box increases or if the surface on which the box is pushed is made more rough, the applied force will increase due to the increase in the force of friction between the box and the surface.