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Question

The Moon and the earth attract each other, why does it not collapse into Earth?


  1. Due to the centripetal force which is the force of gravity exerted by earth on the moon.

  2. The sun's gravitational force is greater than that of the earth

  3. The mass of the moon is less than that of the earth

  4. The absence of gravity in space


Solution

The correct option is A

Due to the centripetal force which is the force of gravity exerted by earth on the moon.


When the moon is revolving around the earth, it is actually getting accelerated towards earth in such a way that the radius of the orbit remains constant.

The acceleration towards the earth (called centripetal acceleration) is caused by earth's gravity which acts as a centripetal force.

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