why is it easier to push a box on a smooth surface than on a rough surface?
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Answer:Rough surface contains troughs and valleys i.e non uniformity. This causes obstruction to movement of any object over it.
Explanation:When a box is pushed on a rough surface these ups and downs in the surface resist the box to move ahead….i.e is it applies a resistive force called frictional force
Friction opposes the relative motion of two bodies. This force is proportional to normal force acting on the body (box this case)
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