''A seasoned (experienced) cricketer catches a cricket ball coming in with great speed where as a novice (unexperienced) can hurt his hand in same act'' -Explain.
When ball is coming to seasoned cricketer he draws his hand in backward direction during catching ball as shown in figure. There by he takes longer time to stop (catch) ball. The novice on the other hand keeps his hand fixed and tries to catch instantly. He need to provide much greater impulse of force to stop ball instantly and can get hurt.
In a tug-of-war contest, two men pull on a horizontal rope from opposite sides. The winner will be the man who
A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's
A body of mass $5 \,kg$ is moving with velocity of $\vec{v}=(2 i+6 \hat{j}) \,m / s$ at $t=0 \,s$. After time $t =2 \,s$, velocity of body is $(10 \hat{i}+6 \hat{j})$, then change in momentum of body is ......... $kg m / s$
In an hour-glass approximately $100$ grains of sand fall per second (starting from rest); and it takes $2 \, s$ for each sand particle to reach the bottom of the hour-glass. If the average mass of each sand particle is $0.2 \,g$, then the average force exerted by the falling sand on the bottom of the hour-glass is close to .......... $N$