NCERT  ·  Physics  ·  Ch.7

Gravitation

Universal Attraction · g on Earth · Satellites & Orbits

50
Questions
40 min
Duration
3
Tiers
6
Topics
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Question Intelligence

Quiz Analytics

A data-driven breakdown of all 50 questions by difficulty, exam origin and topic distribution.

📈 Distribution Overview

50
Total Questions
Concept Check (NCERT)
26
Boards / JEE Main
16
JEE/NEET Edge Cases
8

🗂 Topic Coverage

Universal Law & G
20%
g, Mass, Weight
20%
Earth, Moon & Planets
20%
Pressure & Thrust
16%
Buoyancy & Archimedes
16%
Floating, Sinking & Density
8%
26
Concept Check (NCERT)
16
Boards / JEE Main
8
JEE/NEET Edge Cases
Conceptual Framework

Key Concept Highlights

6 foundational pillars that power every question in this quiz. Understand these, and the answers follow naturally.

🌌
Universal Law of Gravitation
Every mass attracts every other mass with a force along the line joining them, proportional to the product of their masses and inversely proportional to the square of the distance.
🧲
G vs g
G is the universal gravitational constant that fixes the strength of gravity everywhere, while g is the local acceleration due to gravity on a particular planet or moon.
⚖️
Mass, Weight & Variation of g
Mass is the amount of matter and remains the same everywhere; weight is the gravitational force on a body and changes with the value of g on Earth, Moon and other planets.
🌍
Earth, Moon & Orbits
Gravitation keeps the Moon in orbit around Earth and planets around the Sun; the same law explains free fall, weightlessness and near-circular planetary paths.
💧
Pressure & Thrust in Fluids
Pressure in a liquid column depends on depth, density and gravitational acceleration, while thrust is the total normal force acting on a surface.
⚓
Buoyancy, Density & Archimedes
A body immersed in a fluid experiences an upward buoyant force equal to the weight of displaced fluid, which helps explain floating, sinking and relative density.
Pedagogical Value

Why MCQs Matter

Multiple-choice questions are not mere guessing games — they are the sharpest diagnostic tool available to a competitive exam aspirant.

~10–12%

of Class XI + XII Mechanics weightage across Boards & JEE/NEET (via gravitation, satellites & related numericals)

Quick Reference

Important Formula Capsules

8 must-memorise equations that surface repeatedly across CBSE and JEE papers.

Universal Law
\[ F = G \dfrac{m_1 m_2}{r^2} \]
Surface Gravity
\[ g = \dfrac{GM}{R^2} \]
Weight
\[ W = mg \]
Pressure (solid)
\[ P = \dfrac{F}{A} \]
Liquid Pressure
\[ P = h \rho g \]
Buoyant Force
\[ F_b = W_{\text{displaced fluid}} \]
Archimedes Principle
\[ F_b = \rho_{\text{fluid}} V_{\text{disp}} g \]
Density
\[ \rho = \dfrac{m}{V} \]
Learning Outcomes

What You Will Learn

By completing this quiz set you will have exercised all the following competencies.

01 State and apply the Universal Law of Gravitation to qualitative and numerical problems
02 Differentiate clearly between mass and weight and relate both to the value of g
03 Recall and use the approximate values of G, g, Earth’s mass and radius in calculations
04 Explain how g varies with altitude and why weight changes on the Moon and other planets
05 Compute pressure in solids and liquids using thrust, area, depth, density and g
06 Use Archimedes’ principle to decide when bodies float, sink or remain suspended in fluids
07 Interpret everyday situations like weightlessness, floating objects and planetary motion using gravitation concepts
Exam Preparation

Strategy & Preparation Tips

5 evidence-based strategies to maximise your score in CBSE Boards and JEE.

01
Step 01
Lock in the Core Statements
Memorise the exact statements of the Universal Law of Gravitation and Archimedes’ principle — CBSE and boards often ask them directly for short and long answers.
02
Step 02
Values & Units Drill
Practise quick recall of G, g, Earth’s mass and radius, and correct SI units for force, pressure, density and relative density to avoid easy unit-based mistakes.
03
Step 03
Mass vs Weight & g-Variation
Solve multiple questions comparing Earth vs Moon: which quantity changes, which remains constant, and how g varies with height or depth.
04
Step 04
Pressure & Buoyancy Numericals
Focus on hρg, thrust and buoyant force questions involving different liquids, depths and cross-sectional areas — they are standard and very scoring.
05
Step 05
Conceptual MCQs on Orbits
Revise why planets move in nearly elliptical orbits, what keeps the Moon around Earth, and how gravitational force changes with mass and distance for JEE/NEET-style MCQs.

Ready to Test Your Mastery?

50 questions  ·  Elapsed timer  ·  Instant scored results

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GRAVITATION — Learning Resources

📄 Detailed Notes
✔️ True / False
📌 Exercise
💬 Q&A Discussion
🎯 Advance MCQs
📝 Exercises
GRAVITATION-Exercise

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