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Here are some CBSE multiple-choice questions on work and energy class 9 mcq to help you prepare for the upcoming Science Annual Exam.
We’ve compiled essential Multiple Choice Type Questions (MCQs) on Class 9 Science Chapter 11: Work and Energy, each accompanied by the correct answers. It’s crucial for students to practice with these CBSE Class 9 MCQs to prepare for the objective type questions in the Class 9 Science Exam. Additionally, a link to download all the MCQ questions in PDF format is provided below in this article.
Class 9 Science MCQs – Chapter-wise
- Matter in Our Surroundings
- Is Matter Around Us Pure
- Atoms and Molecules
- Structure of Atom
- The Fundamental Unit of Life
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
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
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)
