- Amal Augustine
- December 18, 2025
Mastering Work Energy Power Numericals — Smart & Powerful Physics Questions That Build Conceptual Strength
Work energy power Numericals form one of the most scoring yet concept-intensive chapters in physics.Work energy power numericals questions from this unit frequently test not just formula application, but also direction of force, angle dependence, vector work, frictional losses, and rate of energy transfer.
Work energy power numericals are deeply interconnected concepts that explain motion, force, and energy transfer in physical systems.Understanding the work energy power numericals theorem helps convert complex force problems into simpler energy calculations.
This curated set of Work Energy Power Numericals MCQs with answers is designed to strengthen conceptual clarity while preparing students for Class 9, Class 10, NEET, JEE, and other competitive exams. Each work energy power numericals question reflects a commonly tested exam pattern and reinforces key physical principles.
Work Energy Power Numericals MCQs with Answers :
1. The power of a pump which can pump 200 kg of water to a height of 200 m in 10 s is
A. 40 kW
B. 80 kW
C. 4000 kW
D. 960 kW
Answer: A
2. A body moves a distance of 10 m under a force of 5 N. If work done is 25 J, the angle between force and displacement is
A. 0°
B. 30°
C. 60°
D. 90°
Answer: C
3. 300 J of work is done in sliding a 2 kg block up an inclined plane of height 10 m. Work done against friction is
A. 200 J
B. 100 J
C. 0
D. 1000 J
Answer: B
4. When F = 7 − 2x + 3x² acts from x = 0 to x = 5 m, work done is
A. 70 J
B. 270 J
C. 35 J
D. 135 J
Answer: D
5. If a force F moves a body with velocity v, power is
A. F·v
B. F/v
C. F/v²
D. Fv²
Answer: A
6. A force (5i + 4j) N causes displacement (6i − 5j + 3k) m. Work done is
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Answer: A
7. If F = 3x² + 2x + 1 acts from x = −1 to +1, work done is
A. 2 units
B. 4 units
C. 6 units
D. 8 units
Answer: B
8. A 2 kg block moves up a frictionless 30° incline for 4 m. Work done by tension is
A. 40 J
B. 20 J
C. 68 J
D. 136 J
Answer: A
9. A ball changes velocity from 5 m/s (x-direction) to 7 m/s (y-direction). If work done is 48 J, mass is
A. 2.5 kg
B. 6.5 kg
C. 4 kg
D. 2 kg
Answer: C
10. Force F = Kx³ (K = 2). Work done for 2 m displacement is
A. 10 J
B. 4 J
C. 100 J
D. 8 J
Answer: D
11. A 50 kg block is pulled at 4 m/s by a 500 N force at 30°. Power delivered is
A. 2000/√3 W
B. 500√3 W
C. 1732 W
D. 1864 W
Answer: C
12. Sand falls at 0.5 kg/s on a conveyor belt moving at 5 m/s. Required power is
A. 1.25 W
B. 2.5 W
C. 6.25 W
D. 12.5 W
Answer: D
13. When two bodies have equal momentum, kinetic energy is greater for
A. Lighter body
B. Heavier body
C. Same
D. Cannot be determined
Answer: A
14. A 20 kW engine lifts 200 kg through 40 m. Time taken is
A. 4 s
B. 5 s
C. 8 s
D. 10 s
Answer: A
15. A 50 kgwt force moves a roller 80 m at 60°. Work done is
A. 30 × 10³ J
B. 40 × 10³ J
C. 10 × 10³ J
D. 20 × 10³ J
Answer: D
16. Which statement is NOT correct?
A. Conservative force work equals −ΔPE
B. Energy is conserved
C. Non-conservative force does zero work in closed path
D. Stable equilibrium has minimum PE
Answer: C
17. A person holds 2 kg for 5 s, then lifts it 1 m. Work done is
A. 4.9 J, 0
B. 0, 4.9 J
C. 0, 19.6 J
D. 19.6 J, 0
Answer: C
18. Work done against friction when total work is 100 J for a 1 kg block lifted 5 m is
A. 75 J
B. 25 J
C. 50 J
D. 100 J
Answer: C
19. A body of mass 2 kg is moving with a velocity of 5 m/s. Its kinetic energy is
A. 10 J
B. 15 J
C. 25 J
D. 50 J
Answer: C
20. A body is raised vertically upward with constant speed. The work done by gravity is
A. Positive
B. Negative
C. Zero
D. Maximum
Answer: B
21. A spring of force constant k is compressed by a distance x. The potential energy stored is
A. kx
B. kx²
C. ½kx²
D. 2kx²
Answer: C
22. Which of the following quantities does NOT depend on the frame of reference?
A. Velocity
B. Acceleration
C. Kinetic energy
D. Displacement
Answer: B
23. The work done by a centripetal force in circular motion is
A. Maximum
B. Minimum
C. Zero
D. Negative
Answer: C
24. A particle moves under a conservative force. Which quantity remains conserved?
A. Momentum
B. Power
C. Mechanical energy
D. Velocity
Answer: C
25. A car is moving on a level road. The engine is switched off and the car comes to rest due to friction. The work done by friction is
A. Positive
B. Zero
C. Negative
D. Infinite
Answer: C
26. The dimensional formula of power is
A. ML²T⁻²
B. ML²T⁻³
C. MLT⁻²
D. ML²T⁻¹
Answer: B
27. A body is thrown vertically upward. At the highest point, its kinetic energy is
A. Maximum
B. Zero
C. Equal to potential energy
D. Equal to initial energy
Answer: B
28. Which graph represents constant power?
A. Force vs time (straight line)
B. Velocity vs time (straight line)
C. Work vs time (straight line)
D. Displacement vs time (curve)
Answer: C
29. A machine lifts a load at constant velocity. The net work done on the load is
A. Positive
B. Negative
C. Zero
D. Infinite
Answer: C
30. If the speed of a body is doubled, its kinetic energy becomes
A. Double
B. Half
C. Four times
D. Eight times
Answer: C
Conclusion
Work energy power numericals are not about memorizing formulas—they are about understanding how forces interact with motion and displacement. Work energy power numericals questions involving variable forces, inclined planes, frictional losses, and vector work reveal whether a student truly grasps physical principles.
Mastery of work energy power numericals builds a strong foundation for solving mechanics numericals efficiently.These work energy power numericals concepts bridge theoretical physics and real-world applications like transportation, machines, and engineering systems.
Regular practice of such concept-driven of work energy power numericals MCQs strengthens analytical thinking and improves performance in board exams and competitive tests. Mastery of this work energy power numericals builds confidence across mechanics, thermodynamics, and modern physics applications.
Amal Augustine is the founder of ExQuizMe, a dynamic learning and quiz platform built to make education engaging, competitive, and fun. A passionate learner and an academic achiever, Amal completed his schooling at Government HSS Manjapra, graduating with 92.5% in Computer Science. He later earned his degree from St. Stephen’s College, University of Delhi, one of India’s most prestigious arts and science institutions.
Currently, Amal is pursuing his Master’s degree at National Sun Yat-sen University, Taiwan, where he continues to deepen his interest in research and technology. Throughout his school and college years, he won 50+ national-level interschool and collegiate quiz competitions, was
Beyond academics, Amal Augustine is an avid reader of science journals, a dedicated research student, and a technology enthusiast who loves programming and exploring the world of Computer Science. Through ExQuizMe, he aims to make learning accessible, enjoyable, and empowering for students across the globe.