MCQsCBSE Class 9 Science Work and Energy MCQ

CBSE Class 9 Science Work and Energy MCQ

Here are some CBSE multiple-choice questions on work and energy class 9 mcq to help you prepare for the upcoming Science Annual Exam.

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    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.

    MCQ Questions Class 9 Science Work and Energy

    Class 9 Science MCQs – Chapter-wise

    1. Matter in Our Surroundings
    2. Is Matter Around Us Pure
    3. Atoms and Molecules
    4. Structure of Atom
    5. 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)

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