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Class 9 Science Chapter 11 Work And Energy Quiz 3 (25 MCQs)

Quiz Instructions

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1. How much work is being done with 200 N of force over 426 meters?
2. In which of the following situations do your arms do work on books?
3. Units for work are
4. The SI Unit for Work
5. The form of energy possessed by the flying bird is-
6. Where is the kinetic energy of pendulum at its highest?
7. When you are on a swing your potential energy is greatest at the ..... point.
8. Energy stored in river water is
9. A weight lifter moves a 45-kg dumbell from the floor to a height of 2 meters. How much work does the weight lifter do on the dumbell?
10. What is mechanical energy?
11. A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?
12. A device which converts the electrical energy into mechanical energy is called:
13. Stored energy in the form of position or condition.
14. A body is moving with velocity 4 m/s, possesses 56 Joules of Kinetic Energy. The momentum of body will be equal to
15. In case of negative work the angle between the force and displacement is .....
16. In tug of war work done by loosing team is:
17. Why is no machine 100% efficient?
18. Is it possible that a body be in accelerated motion under a force acting on the body, yet no work is being done by the force?
19. The energy stored in a compressed spring is .....
20. Work equals force times
21. If the net work done on an object is positive, what can you conclude about the object's motion?
22. The kinetic energy from an object's motion always changes when which factor changes?
23. True or falseYou do work only when you exert a force on an object and move it
24. Which one of the following is the unit of energy
25. Work is zero if the force has a component in the direction opposite of motion.
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