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NCERT Exemplar Solutions Class 9 Science Solutions for Force and Laws of Motion - Exercise in Chapter 9 - Force and Laws of Motion

Question 9 Force and Laws of Motion - Exercise

A goalkeeper in a game of football pulls his hands backward 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 ball on hands

(c) increase the rate of change of momentum

(d) decrease the rate of change of momentum

Answer:

The answer is (b) reduce the force exerted by the ball on hands

Explanation:

Pulling hands backward will help the goalkeeper to reduce the momentum of the ball which in turn reduces the force of the ball exerted on the goalkeeper’s hands.

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