Question

a) Gymnasts often apply some coarse powder on their hands
b) We often sprinkle powder on a carrom board before starting a game​

Answer 1

Answer:

a. so that the friction between their hands and the gymnast poles doesn't work and their hands slide

b. to reduce the force of friction between the carrom coins and the board which allows the coins to move smoothly

Answer 2

a) Gymnasts often apply chalk on their hands for two main functions:

(i) To absorb sweat and make hands less sweaty.

(ii) To increase the friction as chalk is a coarse substance.

b) We sprinkle powder on carrom board to make the surface of the board smooth. This reduces the friction between the surface of the carrom board, the striker and the coins. As a result, the coins and the striker can move easily on the carrom board.