Last Updated on May 15, 2025 by XAM CONTENT
Understanding the key concepts of Class 9 Science Chapter 10 – Work and Energy is crucial for exam success. To make your revision easier, we have created chapterwise mcq questions with Answers for class 9 Science based on the latest syllabus and exam pattern. It is a part of MCQ Questions for CBSE Class 9 Science Series.
These multiple-choice questions will help you assess your knowledge, improve accuracy, and boost confidence for your exams. Whether you are preparing for school tests, online tests or competitive exams, these Work and Energy MCQs will strengthen your conceptual clarity.
| Chapter | Work and Energy |
| Book | Science Textbook for Class 9 |
| Type of Questions | MCQ Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 9 |
| Subject | Science |
| Useful for | Class 9 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 9 Science Chapterwise MCQ Questions |
MCQ Questions on Work and Energy Class 9 Science
MCQs
Q1. What is the scientific condition for work to be done?
(a) Only force is applied
(b) Only displacement occurs
(c) Force and displacement must be in same direction
(d) Object must move fast
Show Answer
Answer: (c)
Explanation: Work is done only when a force causes displacement in the direction of the force.
Q2. Which of the following activities involves zero work done scientifically?
(a) Lifting a book
(b) Pushing a wall that doesn’t move
(c) Throwing a ball
(d) Pulling a cart
Show Answer
Answer: (b)
Explanation: No displacement means no work done, regardless of effort.
Q3. The SI unit of work is:
(a) Newton
(b) Joule
(c) Watt
(d) Pascal
Show Answer
Answer: (b)
Explanation: Work is measured in joules (J), where 1 J = 1 N × 1 m.
Q4. Which of the following indicates negative work?
(a) Force and displacement are in same direction
(b) Object is at rest
(c) Force acts opposite to displacement
(d) Force is zero
Show Answer
Answer: (c)
Explanation: Work is negative when force opposes displacement.
Q5. Which of the following has kinetic energy?
(a) A stretched bow
(b) A book on a table
(c) A moving car
(d) A compressed spring
Show Answer
Answer: (c)
Explanation: Kinetic energy is energy due to motion, as in a moving car.
Q6. The kinetic energy of an object increases with:
(a) Decrease in velocity
(b) Increase in mass and speed
(c) Increase in potential
(d) Increase in height
Show Answer
Answer: (b)
Explanation: KE = ½mv², so increasing mass or velocity increases kinetic energy.
Q7. Potential energy of an object at height h is given by:
(a) mgh
(b) ½mv²
(c) mg/h
(d) mv²
Show Answer
Answer: (a)
Explanation: PE = mgh where m is mass, g is gravity, and h is height.
Q8. What happens to energy when it is transformed from one form to another?
(a) It disappears
(b) It is destroyed
(c) Total energy remains the same
(d) It doubles
Show Answer
Answer: (c)
Explanation: Law of conservation of energy: energy is neither created nor destroyed.
Q9. Which of these devices converts chemical energy to electrical energy?
(a) Electric motor
(b) Generator
(c) Battery
(d) Bulb
Show Answer
Answer: (c)
Explanation: A battery converts stored chemical energy into electrical energy.
Q10. A moving object can do work because it possesses:
(a) Potential energy
(b) Kinetic energy
(c) Gravitational energy
(d) Elastic energy
Show Answer
Answer: (b)
Explanation: Motion gives an object the capacity to do work, i.e., kinetic energy.
Q11. Which form of energy is stored in a stretched rubber band?
(a) Kinetic
(b) Thermal
(c) Potential
(d) Light
Show Answer
Answer: (c)
Explanation: A stretched rubber band stores potential energy due to its position.
Q12. Which device is used to measure power consumption in homes?
(a) Voltmeter
(b) Ammeter
(c) Wattmeter
(d) Electric meter
Show Answer
Answer: (d)
Explanation: Electric meters measure energy used in kilowatt-hours (kWh).
Q13. If the speed of a body is doubled, its kinetic energy becomes:
(a) Same
(b) Double
(c) Four times
(d) Half
Show Answer
Answer: (c)
Explanation: KE ∝ v², so doubling speed increases KE by 4 times.
Q14. What is the power of a machine that does 100 J of work in 10 s?
(a) 10 W
(b) 100 W
(c) 1 W
(d) 1000 W
Show Answer
Answer: (a)
Explanation: Power = Work / Time = 100 J / 10 s = 10 W.
Q15. A man lifts a 20 kg box to a height of 2 m. Work done is:
(a) 400 J
(b) 40 J
(c) 20 J
(d) 200 J
Show Answer
Answer: (a)
Explanation: Work = mgh = 20 × 10 × 2 = 400 J.
Q16. An object of 1 kg is dropped from a height of 10 m. Its KE just before hitting ground is:
(a) 10 J
(b) 100 J
(c) 9.8 J
(d) 98 J
Show Answer
Answer: (d)
Explanation: KE = PE at top = mgh = 1 × 9.8 × 10 = 98 J.
Q17. Which of these is not an energy transformation?
(a) Solar to chemical in plants
(b) Chemical to heat in fire
(c) Electrical to mechanical in fan
(d) Mass to energy in battery
Show Answer
Answer: (d)
Explanation: Batteries convert chemical to electrical energy, not mass to energy.
Q18. Which energy is used by a hydropower plant?
(a) Kinetic
(b) Potential
(c) Solar
(d) Chemical
Show Answer
Answer: (b)
Explanation: Water stored at a height has potential energy, used to generate electricity.
Q19. A machine does 500 J work in 5 s. Power of machine is:
(a) 1000 W
(b) 100 W
(c) 50 W
(d) 500 W
Show Answer
Answer: (b)
Explanation: Power = 500 / 5 = 100 W.
Q20. Which of these best explains law of conservation of energy in a pendulum?
(a) Kinetic energy becomes zero
(b) Energy is created
(c) Energy changes form but total remains constant
(d) Total energy increases
Show Answer
Answer: (c)
Explanation: In a pendulum, PE and KE keep interchanging but total energy remains constant.
We hope the given mcq questions with Answers for Work and Energy Class 9 helps you in your learning.
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Topics from which mcq questions may be asked
- Work and its calculation
- Energy and power
- Forms and transformation of energy
Work and energy power everything from muscle movement to machines.
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Frequently Asked Questions (FAQs) on Work and Energy MCQ Questions
Q1: What are MCQ questions in Class 9 Science?
A1: MCQ (Multiple Choice Questions) in Class 9 Science are objective-type questions where students choose the correct answer from four options. They test conceptual understanding, application, and reasoning skills.
Q2: Are these Class 9 Science MCQs based on the latest CBSE syllabus?
A2: Yes, all MCQ questions provided are strictly based on the latest CBSE Class 9 Science syllabus and follow the current NCERT textbook.
Q3: Are Class 9 Science MCQ questions useful for board exam preparation?
A3: Yes, practicing MCQ questions helps build strong conceptual understanding and improves performance in school tests, Olympiads, and board-level competency assessments.
Q4: Do these MCQs include answers and explanations?
A4: Absolutely. Each MCQ question includes the correct answer along with a detailed explanation to help students understand the concept behind the question.
Q5: Where can I find the best MCQ questions for Class 9 Science?
A5: You can find high-quality, CBSE-based MCQ questions for Class 9 Science on trusted educational websites like xamcontent.com. These include chapterwise, topicwise, and competency-based questions aligned with the latest syllabus
Q6: Are there any resources available online for students to practice mcq questions on class 9 science chapter 10 “Work and Energy“ for CBSE exams?
A6: Yes, several educational websites offer mcq questions for CBSE students preparing for science examinations. We also offer a collection of mcq questions for all classes and subject on our website. Visit our website to access these questions and enhance your learning experience. for more mcq, you can also visit Physics Gurukul Website.
