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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

4. 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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7. 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

 
 
 
 

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

 
 
 
 

9. 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 )

 
 
 
 

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

 
 
 
 

11. A microphone converts sound energy to

 
 
 
 

12. 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
 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

16. In a collision,

 
 
 
 

17. 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)

 
 
 
 

18. One kWh is

 
 
 
 

19. In an oscillating simple pendulum,

 
 
 
 

20. In the explosion of a cracker/bomb

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

24. 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

 
 
 
 

25. 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
 
 
 
 

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

 
 
 
 

27. 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

 
 
 
 

28. 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
 
 
 
 

29. 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

 
 
 
 

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

 
 
 
 

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