Q33 of 176 Page 101

State two applications of universal law of gravitation.

The two applications of universal law of gravitation are:

(i) Universal law of gravitation is used to determine the masses of the sun, the earth and the moon accurately.


(ii) Universal law of gravitation helps in discovering new stars and planets.


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31

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

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What happens to the gravitational force between two objects when the distance between them is: (i) Doubled (ii) Halved

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Explain why, if a stone held in out hand is released, it falls towards the earth.

 35

Calculate the force of gravitation between two objects of masses 50 kg and

120 kg respectively kept at a distance of 10 m from one another. (Gravitational constant, G = 6.7 × 10-11 Nm2 Kg-2)