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JEE • PHYSICS • GRAVITATION

Gravitation practice · Hard

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Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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1 Hard

1 of 5

Remembering +4 | -1

Weight of body is maximum at:

View answer and explanation

Correct option: B

Poles of the earth

Option B (Poles of the earth) is correct because the Earth is an oblate spheroid, so the radius is smaller at the poles, resulting in a higher gravitational acceleration and thus maximum weight.

2 Hard

2 of 5

Application +4 | -1

An astronaut takes a ball of mass

m

from earth to space. He throws the ball into a circular orbit about earth at an altitude of

318.5 \mathrm{~km}

. From earth's surface to the orbit, the change in total mechanical energy of the ball is

x \frac{G M_e m}{21 R_e}

. The value of

x

is (take

\left.{R}_{{e}}=6370 \mathrm{~km}\right)

View answer and explanation

Correct option: A

Option A (11) is correct because it is the calculated value of x based on the change in total mechanical energy from Earth's surface to the orbit.

3 Hard

3 of 5

Analyzing +4 | -1

Pertaining to two planets, the ratio of escape velocities from respective surfaces is

1: 2

, the ratio of the time period of the same simple pendulum at their respective surfaces is

2: 1

(in same order). Then the ratio of their average densities is

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Correct option: C

1: 4

Option C is correct because the ratio of average densities is calculated using the ratios of escape velocities and time periods of a simple pendulum.

4 Hard

4 of 5

Analyzing +4 | -1

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Angular momentum conservation can be used to explain Kepler's second law of planetary motion.

Reason (R): Areal velocity of a planet revolving around the sun is equal to its angular momentum.

In the light of the above statements, choose the correct answer from the options given below:

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Correct option: C

(A) is true but (R) is false

Option C is correct because while angular momentum conservation explains Kepler's second law, the areal velocity is proportional to angular momentum, not equal to it.

5 Hard

5 of 5

Understanding +4 | -1

Assertion: Work done by or against gravitational force in moving a body from one point to another is independent of the actual path followed between the two points.
Reason: Gravitational forces are conservative forces.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion

Option A is correct because gravitational forces are conservative, meaning the work done is path-independent and depends only on the initial and final positions.

Revision notes and key takeaways

Review GRAVITATION in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 5 single-correct-answer MCQs on GRAVITATION.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

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