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  1. State the source of centripetal force that a planet requires to revolve around the Sun. 
  2. On what factors does that force depend? 
  3. Suppose this force suddenly becomes zero, then in which direction will the planet begin to move if no other celestial body affects it?

Asked by Topperlearning User 12th July 2016, 3:40 PM
Answered by Expert
Answer:
  1. The source of centripetal force is the gravitational force between the planet and Sun.
  2. Gravitational force depends on the mass of the planet, mass of the Sun and distance between them.
  3. The planet will begin to move in a straight line tangential to the point of circle in which it was moving at the instant force became zero.
Answered by Expert 12th July 2016, 5:40 PM
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