Physics · Gravitation
JEE Main 2025 — 7 April, Evening Shift — Question 56
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 options given below.
- Option A:
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- Option B:
(A) is correct but ( ) is not correct
- Option C:Correct
Both (A) and (R) are correct and (R) is the correct explanation of (A)
- Option D:
(A) is not correct but ( ) is correct
Answer: C
Step-by-step solution
From Kepler's law constant and angular momentum
for central force is constant. so, both (A) and (R) are correct and (R) explain (A)
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2025
- Subject
- Physics
- Chapter
- Gravitation
- Topic
- Planetary Motion & Binary Star System (Kepler's Law)