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JAMB Physics 1982 Question 11

Question 11

Gravitational Field

The force responsible for holding the moon in its orbit around the earth against the gravitational pull of the earth is

  1. A.centrifugal
  2. B.rotational
  3. C.reaction
  4. D.centripetal
  5. E.tractional.
Show the answer and explanation

Answer: D (centripetal)

Explanation

A body moving in a circle needs a centripetal force towards the centre; for the moon it is supplied by the earth's gravity.