PDF chapter test TRY NOW
1. Define friction. Give two examples of the utility of friction in day to day life.
a. The friction arises due to the presence of between the surfaces.
b. The interlocking of the of the two surfaces produces frictional force.
c. The working of pen is due to .
2. Mention any three ways of minimising friction
a. Oil is used to friction between two surfaces.
b. Carrom board - .
c. Ceiling Fans - .
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