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JEE Main20257 Apr 2025Evening ShiftPhysicsGravitationActual

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The radius vector from the Sun to a planet sweeps out equal areas in equal intervals of time and thus areal velocity of planet is constant. Reason (R) : For a central force field the angular momentum is a constant. In the light of the above statements, choose the most appropriate answer from the o

Options

  1. ABoth ( A ) and ( R ) are correct and ( R ) is the correct explanation of ( A)
  2. BBoth ( A ) and ( R ) are correct but ( R ) is not the correct explanation of (A)
  3. C(A) is correct but ( R ) is not correct
  4. D(A) is not correct but (R) is correct

Correct answer

A. Both ( A ) and ( R ) are correct and ( R ) is the correct explanation of ( A)

Step-by-step solution

dA dt = L 2 ~m Due to central force torque is zero & angular momentum is constant.

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