Master Class 9 Science – Work and Energy with Our MCQ Mock Test!

Do you know how work, energy, and power are related in everyday life? Test your understanding with this MCQ-based mock test on Work and Energy, designed as per the latest Class 9 Science syllabus. This test covers all essential topics — concept of work done, different forms of energy, kinetic and potential energy, law of conservation of energy, and power with numerical-based questions for solid practice.

Each question in this mock test is designed to help you revise key formulas, strengthen conceptual clarity, and get comfortable with exam-style problem solving. It’s the perfect tool for quick revision, self-assessment, and boosting your confidence before exams.

Attempt now and power up your preparation for the chapter “Work and Energy”!

1. One kWh is

 
 
 
 

2. A bullet entering a metal block of 30 cm length stops on reaching 25 cm. The energy with the bullet will be lost

 
 
 
 

3. Two cars A and B approaching each other with momentum of 50 kg m/s and 25 kg m/s respectively, stick to each other after collision. The momentum after the collision is

 
 
 
 

4. A man holds and displaces a 20 kg mass horizontally in his stretched hand.

 
 
 
 

5. An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same

 
 
 
 

6. If a force of F newton moves a body with constant speed v, the power delivered by it is

 
 
 
 

7. If 1 newton of force displaces a body by 1 m, the work done is

 
 
 
 

8. In an oscillating simple pendulum,

 
 
 
 

9. A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 ms–2)

 
 
 
 

10. In the explosion of a cracker/bomb

 
 
 
 

11. A tank contains water of mass ‘m’ to a height ‘h’. The potential energy associated is

 
 
 
 

12. A battery lights a bulb. The sequence of energy transfer in the process is

 
 
 
 

13. Two equal forces acting at angles 30° and 60° with the horizontal displace a body equally on a horizontal surface. Work done in the two cases are W1 and W2 respectively. Then

 
 
 
 

14. Which of the following energy cannot be completely converted into other forms due to the transmission system ?

 
 
 
 

15. An electric bulb of 60 W burns for 5 hours a day. The cost of electricity involved in a month of 30 days at  3.00 per unit is (in )

 
 
 
 

16. A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car

 
 
 
 

17. A boy holds a mass on his stretched hand. Then

 
 
 
 

18. A mass m is moving in a circle of radius 1 m with a uniform speed of 5 m/s.

The work done when its radius turns by 60° is
 
 
 
 

19. In a collision,

 
 
 
 

20. On tripling the speed of motion of a body, the change in K.E. is

 
 
 
 

21. Two masses m and 2m are dropped from certain height ‘h’. Then on reaching the ground,

 
 
 
 

22. A : 50 kg man climbing a ‘slant length of 5 m along a 30° incline.

B : 25 kg man running with 2 m/s speed.
C : A force of 5 N acting on an object moving with 5 m/s speed for 5 min. If the energies in A, B and C are EA, EB and EC respectively, then
 
 
 
 

23. If a 60 W bulb and a 40 W bulb are connected to a source of 220 V potential, the bulb glowing brighter is

 
 
 
 

24. In case of negative work the angle between the force and displacement is

 
 
 
 

25. If the bulbs of 60 W and 40 W are connected in series to a 220 V source the bulb which glows brighter is

 
 
 
 

26. A microphone converts sound energy to

 
 
 
 

27. One unit of electricity is consumed by

A : P = 40 W bulb used for t = 25 hours
B : P = 20 W bulb used for t = 50 hours
Both A and B are true as, energy E in kWh is best related as
 
 
 
 

28. A mass ‘m’ falls from a height ‘h’. At any point on its path the total energy is

 
 
 
 

29. A mass is moving 5 m/s with speed of along the x-direction on a smooth surface, when a force of 5 N acts on it along the y-axis. The work done by against the force is

 
 
 
 

30. When a body falls freely towards the earth, then its total energy

 
 
 
 

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