Q.3- What causes friction?
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Friction is caused due to the irregularities of the surfaces in contact. ... When the two surfaces are moved against each other these bonds resist the motion creating friction. Roughness of surfaces is also a reason for friction. No matter how smooth a surface looks, it has some irregularities.
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Friction is a resistive force, which comes into play when there is a relative motion between two bodies in contact. The frictional force between two bodies depends mainly on three factors:
(i) the adhesion between body surfaces
(ii) roughness of the surface
(iii) deformation of bodies.
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