CBSE Class 9 Science Work and Energy MCQ

Prepare effectively for your Class 9 Science Annual Exam with these CBSE multiple-choice questions (MCQs) on Work and Energy. We’ve curated a set of important MCQs from Class 9 Science Chapter 11: Work and Energy, each provided with the correct answer for quick revision.

Practicing these Class 9 Science MCQs will help students strengthen their understanding of concepts and get ready for the objective-type questions commonly asked in exams. For added convenience, you can also download all the Work and Energy Class 9 MCQs in PDF format from the link provided below.

MCQ for CBSE Class 9 Science Chapter 11 Work and Energy

Q1. Which of the following is a scalar quantity?

A) Force

B) Velocity

C) Work

D) Acceleration

Answer: C) Work

Q2. The unit of work done is:

A) Newton

B) Joule

C) Watt

D) Kilogram

Answer: B) Joule

Q3. When a force moves an object in the direction of the force, it:

A) Increases the potential energy of the object

B) Decreases the kinetic energy of the object

C) Decreases the potential energy of the object

D) Increases the kinetic energy of the object

Answer: D) Increases the kinetic energy of the object

Q4. If the force and displacement are in the same direction, then work done is:

A) Positive

B) Negative

C) Zero

D) None of the above

Answer: A) Positive

Q5. The work done by a gravitational force on a body is:

A) Positive

B) Negative

C) Zero

D) None of the above

Answer: B) Negative

Q6. Which of the following has zero work done when a force is applied?

A) Lifting a book

B) Pushing a wall

C) Holding a bag

D) Kicking a ball

Answer: C) Holding a bag

Q7. If a force of 20 N moves an object a distance of 5 meters, the work done is:

A) 25 J

B) 100 J

C) 5 J

D) 4 J

Answer: B) 100 J

Q8. If the angle between force and displacement is 90°, then work done is:

A) Maximum

B) Minimum

C) Zero

D) Negative

Answer: C) Zero

Q9. Work done is a measure of:

A) Time

B) Force

C) Energy transfer

D) Distance

Answer: C) Energy transfer

Q10. The energy possessed by a body due to its motion is called:

A) Kinetic energy

B) Potential energy

C) Gravitational energy

D) Mechanical energy

Answer: A) Kinetic energy

Q11. Which of the following is a form of potential energy?

A) Sound energy

B) Thermal energy

C) Chemical energy

D) Kinetic energy

Answer: C) Chemical energy

Q12. The gravitational potential energy of an object depends on its:

A) Mass only

B) Height above the ground only

C) Mass and height above the ground

D) Velocity

Answer: C) Mass and height above the ground

Q13. The SI unit of power is:

A) Joule

B) Watt

C) Newton

D) Kilogram

Answer: B) Watt

Q14. Which of the following is a unit of work?

A) Nm

B) N/s

C) N/kg

D) N/m

Answer: A) Nm

Q15. When work is done against friction, energy is converted into:

A) Kinetic energy

B) Potential energy

C) Heat energy

D) Mechanical energy

Answer: C) Heat energy

Q16. The conservation of energy principle states that:

A) Energy can be created but not destroyed

B) Energy can neither be created nor destroyed

C) Energy is always conserved in an isolated system

D) Energy is only conserved in mechanical systems

Answer: B) Energy can neither be created nor destroyed

MCQ Questions for Class 9 Science

• Matter in Our Surroundings
• Is Matter Around Us Pure
• Atoms and Molecules
• The Fundamental Unit of Life
• Tissues
• Motion

Q17. A machine with a mechanical advantage greater than 1:

A) Multiplies force

B) Reduces force

C) Increases speed

D) Decreases speed

Answer: A) Multiplies force

Q18. A pulley system is an example of a machine that:

A) Increases force

B) Increases speed

C) Increases both force and speed

D) Decreases force

Answer: D) Decreases force

Q19. The efficiency of a machine is always:

A) Less than 100%

B) Equal to 100%

C) Greater than 100%

D) Cannot be determined

Answer: A) Less than 100%

Q20. If a force of 50 N is applied to lift a load of 100 kg vertically upward, the work done in lifting the load through a height of 2 meters is:

A) 50 J

B) 100 J

C) 200 J

D) 500 J

Answer: C) 200 J

CBSE Work and Energy Class 9 MCQ with Answers (Moderate Level)

Q1. When a simple pendulum is at its mean position, it primarily possesses:

(a) Kinetic energy

(b) Potential energy

(c) Kinetic + Potential energy

(d) Sound energy

Answer: (a) Kinetic energy

Q2. As a body falls from a height h to h/2 its energy distribution shifts towards:

(a) Only kinetic energy

(b) Half kinetic and half potential energy

(c) Only potential energy

(d) More kinetic and less potential energy

Answer: (d) More kinetic and less potential energy

More resources for class 9

• NCERT Solutions for Class 9 Maths
• NCERT Solutions for Class 9 Science
• NCERT Solutions for Class 9 Social Science

Q3. Given two objects with masses 1 × 10^-3 kg and 4 × 10^-3 kg having equal momentum, what is the ratio of their kinetic energies?

(a) 2:1

(b) 4:1

(c) 1:4

(d) 1:2

Answer: (b) 4:1

Q4. The work done on an object is independent of:

(a) Angle between force and displacement

(b) Force applied

(c) Initial velocity of the object

(d) Displacement

Answer: (c) Initial velocity of the object

Q5. An iron sphere of mass 10 kg and an aluminium sphere of mass 3.5 kg, with the same diameter, are simultaneously dropped from a tower. When they are 10 m above the ground, they experience the same:

(a) Potential energy

(b) Momenta

(c) Acceleration

(d) Kinetic energy

Answer: (c) Acceleration

Q6. In a public address system, a microphone converts:

(a) Sound energy into mechanical energy

(b) Sound energy into electrical energy

(c) Electrical energy into sound energy

(d) Microwave energy into sound energy

Answer: (b) Sound energy into electrical energy

Q7. Which energy change involves frictional force?

i. Potential energy to sound energy

ii. Chemical energy to heat energy

iii. Kinetic energy to heat energy

iv. Chemical energy to heat energy

Select the correct option:

(a) Both (i) and (ii)

(b) Only (iv)

(c) Both (ii) and (iii)

(d) Only (iii)

Answer: (d) Only (iii