Question

10. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to

(a) exert larger force on the ball

(b) reduce the force exerted by the balls on the hands

(c) increase the rate of change of momentum

(d) decrease the rate of change of momentum​

Answer 1

Answer:

b) reduce the force exerted by the balls on the hands.

Explanation:

F = Ma

where F is force M is mass and 'a' is acceleration

here we can clearly see, F is directly proportional to 'a'

and, we know that acceleration is inversely proportional to change in Time.

Hence, Force is also inversely proportional to change in Time.

As the goalkeeper pulls his hands backs, he takes more time to stop the ball and hence less force is exerted

Answer 2

Answer:

Explanation:

Option c:increase the rate of change of momentum because when the force is applied to a certain objects by stable substance after giving the force the stable object to be remained in constant.