Do you want to improve your understanding of general science questions, especially on the topics of Gravitation, Work and Energy? Inspired by the NCERT GK book, this effort offers you a carefully selected set of general science (physics) GK questions with answers. These GK question and answer sets, which cover the concepts of Gravitation, Work and Energy are ideal for students, competitive exam candidates, and inquisitive learners. These science-based tests, which feature an easy-to-understand format, help improve memory retention and solidify fundamentals. Our collection of science and physics questions will help you learn more effectively, whether you’re studying for school exams or general knowledge assessments.
In this blog post, we’ve compiled 50 Most Important General Science GK Questions on Gravitation, Work and Energy with detailed answers as a part of the Science GK effort by our team. These questions are ideal for aspirants preparing for UPSC, SSC, Railway, CDS, NDA, State PSC, and other government exams. Understanding these facts not only strengthens your static GK but also gives an edge in science, especially in the general science and physics sections.
Multiple-Choice Question (Questions on Gravitation, Work and Energy)
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📘 Gravitation:
- The force responsible for the falling of an apple from a tree is:
a) Magnetic force
b) Electrostatic force
c) Gravitational force
d) Centripetal force - The scientist who gave the Universal Law of Gravitation is:
a) Galileo
b) Kepler
c) Newton
d) Cavendish - The Universal Law of Gravitation states that force is:
a) Proportional to sum of masses
b) Proportional to difference of masses
c) Proportional to product of masses
d) Proportional to square of masses - Gravitational force varies with:
a) Square of mass
b) Inverse square of distance
c) Directly with distance
d) Inversely with velocity - The value of universal gravitational constant (G) is:
a) 6.7 × 10⁻⁸
b) 6.7 × 10⁻¹¹ Nm²/kg²
c) 9.8 m/s²
d) 1.6 × 10⁻¹⁹ - The SI unit of G is:
a) N/kg
b) J/kg
c) Nm²/kg²
d) N/m² - Who determined the value of G experimentally?
a) Newton
b) Galileo
c) Henry Cavendish
d) Kepler - Acceleration due to gravity (g) on earth is:
a) 10.8 m/s²
b) 9.8 m/s²
c) 6.7 m/s²
d) 8.8 m/s² - The SI unit of g is:
a) N/kg
b) m/s²
c) Nm/kg²
d) J/kg - Relation between g, G, M and R is:
a) g = GR/M²
b) g = MR/G²
c) g = GM/R²
d) g = MGR² - The motion of the moon around earth is due to:
a) Magnetism
b) Inertia
c) Centripetal force of gravity
d) Electrostatic force - The weight of a body is:
a) Force with which earth attracts it
b) Mass × velocity
c) Mass × acceleration
d) Independent of g - Weight (W) of a body is given by:
a) W = mg²
b) W = m²g
c) W = mg
d) W = m/g - Mass of an object:
a) Changes with place
b) Changes with altitude
c) Remains constant everywhere
d) Changes with gravity - Weight of an object on moon is:
a) Same as earth
b) 1/6 of weight on earth
c) Double of earth
d) Zero - SI unit of weight is:
a) kg
b) Newton
c) Pascal
d) Joule - The force per unit area is called:
a) Weight
b) Thrust
c) Pressure
d) Density - SI unit of pressure is:
a) N/m
b) N/m² or Pascal
c) J/m²
d) kg/m² - Pressure is inversely proportional to:
a) Force
b) Area
c) Mass
d) Distance - The upward force acting on objects in fluids is:
a) Pressure
b) Weight
c) Buoyant force
d) Gravity - Archimedes’ principle states that:
a) Pressure = Force × Area
b) Upthrust = weight of displaced fluid
c) Force = Mass × Gravity
d) Density = Mass/Volume - Objects float if:
a) Density is more than liquid
b) Density is less than liquid
c) Mass is more than liquid
d) Mass is less than liquid - Density is given by:
a) Mass × Volume
b) Volume/Mass
c) Mass/Volume
d) Mass × Area - SI unit of density is:
a) J/m³
b) N/m²
c) kg/m³
d) g/cm³ - The scientist who discovered buoyancy principle is:
a) Newton
b) Galileo
c) Archimedes
d) Pascal
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📘 Work and Energy:
- Work is said to be done when:
a) Force is applied
b) Force is applied and displacement occurs
c) Only displacement occurs
d) Energy is lost - Work done (W) is expressed as:
a) W = F + s
b) W = F – s
c) W = F × s
d) W = F/s - SI unit of work is:
a) Watt
b) Joule
c) Newton metre (Joule)
d) Pascal - 1 joule = work done when force of 1 N displaces object by:
a) 10 m
b) 1 m
c) 0.1 m
d) 100 m - Work is positive when:
a) Force opposes displacement
b) Force is in direction of displacement
c) No displacement
d) Work is zero - Work is negative when:
a) No force
b) Force absent
c) Force is opposite to displacement
d) Energy constant - Energy is:
a) Mass × Velocity
b) Capacity to do work
c) Force × Displacement
d) Weight × Height - SI unit of energy is:
a) Newton
b) Joule
c) Joule
d) Watt - Energy possessed due to motion is:
a) Potential energy
b) Heat energy
c) Kinetic energy
d) Chemical energy - Kinetic energy formula is:
a) mgh
b) ½ mv²
c) mv
d) F × d - Energy possessed due to position is:
a) Potential energy
b) Kinetic energy
c) Heat energy
d) Mechanical energy - Potential energy formula is:
a) ½ mv²
b) mgh
c) mv²
d) F × s - Law of conservation of energy states:
a) Energy is lost
b) Energy is created
c) Energy is destroyed
d) Energy is transformed, total remains constant - Mechanical energy is sum of:
a) Heat + Light
b) Potential + Heat
c) Kinetic + Potential
d) Mass + Velocity - SI unit of power is:
a) Joule
b) Watt
c) Newton
d) Pascal - Power is defined as:
a) Work × Time
b) Work – Time
c) Work/Time
d) Force/Distance - 1 Watt = work done of 1 joule in:
a) 1 hour
b) 1 minute
c) 1 second
d) 10 seconds - Larger unit of power is:
a) Joule
b) Newton
c) Kilowatt
d) Pascal - 1 kW =:
a) 10 J/s
b) 1000 J/s
c) 100 J/s
d) 10000 J/s - Power of a motor is 1000 W. Work done in 10 s is:
a) 10 J
b) 100 J
c) 10000 J
d) 1000 J - Which energy is possessed by a stretched bow?
a) Kinetic
b) Potential
c) Heat
d) Sound - A moving bullet possesses:
a) Potential energy
b) Kinetic energy
c) Heat energy
d) Electrical energy - Potential energy at height h is:
a) mgh
b) ½ mv²
c) F × s
d) mv - Kinetic energy of 2 kg ball moving at 3 m/s is:
a) 6 J
b) 3 J
c) 9 J
d) 12 J - A body of mass 10 kg at a height 5 m. Potential energy is:
a) 25 J
b) 490 J
c) 100 J
d) 50 J
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Answer Key
| S. No. | Answer | S. No. | Answer |
| 1 | C. Gravitational force | 26 | B. Force is applied and displacement occurs |
| 2 | C. Newton | 27 | C. W = F × s |
| 3 | C. Proportional to product of masses | 28 | C. Newton metre (Joule) |
| 4 | B. Inverse square of distance | 29 | B. 1 m |
| 5 | B. 6.7 × 10⁻¹¹ Nm²/kg² | 30 | B. Force is in direction of displacement |
| 6 | C. Nm²/kg² | 31 | C. Force is opposite to displacement |
| 7 | C. Henry Cavendish | 32 | B. Capacity to do work |
| 8 | B. 9.8 m/s² | 33 | C. Joule |
| 9 | B. m/s² | 34 | C. Kinetic energy |
| 10 | C. g = GM/R² | 35 | B. ½ mv² |
| 11 | C. Centripetal force of gravity | 36 | A. Potential energy |
| 12 | A. Force with which earth attracts it | 37 | B. mgh |
| 13 | C. W = mg | 38 | D. Energy is transformed, total remains constant |
| 14 | C. Remains constant everywhere | 39 | C. Kinetic + Potential |
| 15 | B. 1/6 of weight on earth | 40 | B. Watt |
| 16 | B. Newton | 41 | C. Work/Time |
| 17 | C. Pressure | 42 | C. 1 second |
| 18 | B. N/m² or Pascal | 43 | C. Kilowatt |
| 19 | B. Area | 44 | B. 1000 J/s |
| 20 | C. Buoyant force | 45 | C. 10000 J |
| 21 | B. Upthrust = weight of displaced fluid | 46 | B. Potential |
| 22 | B. Density is less than liquid | 47 | B. Kinetic energy |
| 23 | C. Mass/Volume | 48 | A. mgh |
| 24 | C. kg/m³ | 49 | C. 9 J |
| 25 | C. Archimedes | 50 | B. 490 J |
Tips for Aspirants – Why These GK Questions Matter?
If you’re aiming for exams like UPSC, SSC, Railways, or other State Public Service Commissions, mastering General Science questions is a must. Because science GK questions constitute a significant part of it. Questions from “Gravitation, Work and Energy” are frequently repeated in exams because they establish a scientific foundation for understanding the topics of General science.
🟢 These GK questions with answers help in:
- Strengthening your static GK base
- Quick revision of conceptual theories
- Differentiating between similar-sounding options
Pro Tip: Revise these questions multiple times, focus on keywords, and try linking each theory to a scientist’s name—it really helps in the elimination strategy!
Conclusion
We hope you found this collection of 50 MCQs on Gravitation, Work and Energy helpful in your exam preparation. General Science isn’t just about memorising formulae and terminologies—it’s about understanding how our discipline continues to evolve from the very beginning.
👉 Stay tuned for General Science GK Part-6
✍️ For more GK questions with answers, visit our dedicated 👉 GK Section.
