Explain how, a karate player can break a pile of tiles with a single blow of his hand.

(a) Explain why, a cricket player moves his hands backwards while catching a fast cricket ball (b) A 150 g ball, travelling at 30 m/s, strikes the palm of a player's hand and is stopped in 0.05 second. Find the force exerted by the ball on the hand.

In how many ways 11 players can be selected from 15 players,if only 6 of these players can bowl and the 11 players must include atleast 4 bowlers?

In how many ways 11 players can be selected from 15 cricket players ?

Explain why a player lowers his hands while catching a cricket ball.

What is relative velocity ? Explain how a man can hold his umbrella while walking on ground in a rain.

A wooden pile of mass m=3kg is driven into the driven into the ground by suceessive blows from a hammer of mass M=10kg falling from a height h=3 m on the head of the pile. If under the action of a single blow the pile penetrates a distance delta = 5 cm, determine the resistance R to penetration.

In how many ways, a cricket team of 11 players can be made from 15 players, if a particular player is always chosen?