JEE Gravitation Quiz
Practice on Newton's law of gravitation, variation of g, gravitational potential energy, orbital and escape velocity, and Kepler's laws - with an explanation for every answer.
Skill map
Levels in this jee gravitation quiz
Every question is generated fresh by AI and calibrated to your level - clear a level and the next one gets harder. Miss one and the AI tutor explains Gravitation until it sticks, then aims a follow-up at the gap. Want to grind one level? Start the quiz and type that sub-topic as your own.
Exam focus
How Gravitation is asked
A compact chapter with a small formula set, which makes it efficient to prepare relative to the marks it returns. Questions are usually single-concept rather than multi-step, and a noticeable share of them test the sign and meaning of gravitational potential energy rather than any calculation.
Cheat sheet
Gravitation formulas worth memorising
| Quantity | Formula |
|---|---|
| Gravitational force | F = Gm₁m₂/r² |
| Acceleration due to gravity | g = GM/R² |
| g at height h (h ≪ R) | g(h) ≈ g(1 − 2h/R) |
| g at depth d | g(d) = g(1 − d/R) |
| Gravitational PE | U = −GMm/r |
| Orbital velocity | v(o) = √(GM/r) |
| Escape velocity | v(e) = √(2GM/R) = √2 · v(o) |
| Kepler's third law | T² ∝ r³ |
Marks lost here
Common mistakes in Gravitation
- Dropping the minus sign on gravitational potential energy. U = −GMm/r is negative because the reference point is at infinity, and questions about binding energy or the energy needed to move a satellite depend entirely on that sign.
- Confusing escape velocity with orbital velocity. Escape velocity is √2 times the orbital velocity at the same radius - roughly 11.2 km/s versus 7.9 km/s near Earth's surface.
- Using g = GM/R² below the surface. Inside a uniform Earth g falls linearly with distance from the centre, so it decreases with depth rather than increasing.
- Thinking astronauts float because gravity is absent in orbit. Gravity in low Earth orbit is close to its surface value; they float because they and the station are in continuous free fall together.
- Applying Kepler's third law with a diameter or an altitude instead of the orbital radius measured from the centre of the body.
Game rules
How a round works
- 01Spawn
Press play - the AI generates Gravitation questions in seconds.
- 02Level up
Answer to earn XP and build a streak. Difficulty adapts to your accuracy and speed.
- 03Learn or lose
Every answer - right or wrong - gets an AI tutor explanation. Wrong answers respawn as follow-ups.
Leaderboard
Gravitation high scores
Next challenges
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Player's guide
JEE Gravitation Quiz - FAQs
Does escape velocity depend on the mass of the object escaping?
No. It follows from energy conservation, and the escaping body's mass cancels from both sides. Escape velocity depends only on the mass and radius of the body being escaped from - which is why it is the same for a pebble and a rocket.
Where is g the greatest on Earth?
At the poles, and it decreases toward the equator because of both the equatorial bulge and the rotation of the Earth. It also decreases with altitude and with depth below the surface, so the surface value at the poles is the maximum.
Is the jee gravitation quiz free?
Yes - completely free, with no sign-up required. Type a topic, press start, and the AI generates an adaptive Gravitation quiz with an explanation for every answer.
Can teachers host this jee gravitation quiz live for a class?
Yes - create a free teacher account, host a live room on "Gravitation", and students join with a 6-character code at quff.in/join. No student accounts needed.
From the blog
Gravitation guides & reading
JEE Gravitation: 30 Practice Questions with Solutions
Thirty solved Gravitation questions - and why the minus sign in U = −GMm/r is the single most examined detail in the chapter.
Exam PrepJEE Rotational Motion: 30 Practice Questions with Solutions
Thirty solved questions on moment of inertia, torque, angular momentum and rolling - the chapter most students postpone and then run out of time for.
Exam PrepJEE Oscillations and SHM: 30 Practice Questions Solved
Thirty solved SHM questions, and the test that decides whether a motion is simple harmonic at all - which is what most of these questions are really asking.
More exam prep quizzes
Ready, player?
Six adaptive Gravitation questions. About two minutes. Climb the podium.