JEE PHYSICS MCQ: GRAVITATION

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Statement I: Earth continuously attracts the moon towards its centre and yet the moon does not move towards the centre of earth.

Statement II: The gravitational force of atteraction between the moon and earth provides the necessary centripetal force.

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Correct option: D

If Statement - I is false but Statement - II is true.

Option D (If Statement - I is false but Statement - II is true) is correct because the Earth does attract the moon, and this gravitational force provides the necessary centripetal force for the moon's orbit.

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{45^0}

with the vertical, the escape velocity will be The escape velocity of a body projected from the surface of earth is

v_e

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\theta

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Statement II: As observed by another astronaut's in the same satellite, force of gravity and centrifugal force balance each other. An iron ball and a wooden ball of the same radius are released from a height 'h' in vacuum. The time taken by both of them to reach the ground is