Sunita has to push a lighter box and Radha has to push a similar
heavier box on the same floor. Who will have to apply a larger force and
why?
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Radha has to apply larger force because her box is heavier and as the box is heavier the layer of box that is sliding on the floor get interlocked as the floor is not smooth it contains the zig zag shape and gets locked...
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Due to the interlocking of the irregularities on the two surfaces in contact, the force of friction arises. On the floor when a heavy object is placed, the interlocking of irregularities on the surface of the box and floor become strong. This is because the two surfaces in contact are pressed harder. Hence, more force is required to overcome the interlocking. Thus, to push the heavier box, Seema has to apply greater force than Iqbal..
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