Grease and oil applied between moving parts of a machine increase the friction between them.

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True/FalseLubrication to Reduce Friction

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Why is fine powder sprinkled on a carrom board before playing?

TextLubrication to Reduce FrictionFactors Affecting Force of Friction

'Friction is both a friend and a foe.' Justify the statement with two examples of each, and suggest two ways of reducing friction where it is not wanted.

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Rolling Friction

Lubrication to Reduce Friction

Advantages and Disadvantages of Friction

Riya cycles 3 km to school every day. Her father oils the chain and the axles of her bicycle every Sunday. On a dry, sandy stretch of road she finds pedalling much harder than on the smooth tar road. When she presses the brakes, the brake rubber pads press against the wheel rims and the bicycle slows down.

CASE_STUDIESRolling FrictionLubrication to Reduce FrictionNet Force on an Object