If you are trying to push a heavy box on a horizontal surface, list various forces acting on the box. State the condition under which this box will start sliding on the surface. How will the magnitude of applied force required to move the box change if: (a) weight of the box is increased? (b) the surface on which the box is placed is made more rough?
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.
