Q29 of 176 Page 101

Can we apply Newton’s third law to the gravitational force? Explain your answer.

Yes, Newton’s third law of motion holds good for the force of gravitation. This means that when earth exerts a force of attraction on an object, then the object also exerts an equal force on the earth, in the opposite direction.


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28

What do you mean by the term ‘free fall’?

 28

During a free fall, will heavier objects accelerate more than lighter ones?

 30

Give reason for the following:

The force gravitation between two cricket balls is extremely small but that between a cricket ball and the earth is extremely large.

 31

Describe how the gravitational force between two objects depends on the distance between them.