JEE Main202427 Jan 2024Evening ShiftPhysicsGravitationActual
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) . Assertion (A) : The angular speed of the moon in its orbit about the earth is more than the angular speed of the earth in its orbit about the sun. Reason (R) : The moon takes less time to move around the earth than the time taken by the earth to move around the sun. In the light of the above statements, choose
Options
- A(A) is correct but (R) is not correct
- BBoth (A) and (R) are correct and (R) is the correct explanation of A.
- CBoth (A) and (R) are correct but (R) is not the correct explanation of A.
- D(A) is not correct but (R) is correct
Correct answer
B. Both (A) and (R) are correct and (R) is the correct explanation of A.
Step-by-step solution
It is known that ω = 2 π T ⇒ ω ∝ 1 T As, T moon ≈ 27 days T earth ≈ 365 days ⇒ ω moon > ω earth Hence, Both the assertion and the reason are correct and the reason is the correct explanation for the assertion.