MCQ Class 9 Science Exploration Chapter 7 Work, Energy and Simple Machines

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1. Mechanical energy is:

Question 1 of 20

2. Mechanical energy is conserved when:

Question 2 of 20

3. During free fall, potential energy:

Question 3 of 20

4. During free fall, kinetic energy:

Question 4 of 20

5. Power is defined as:

Question 5 of 20

6. SI unit of power is:

Question 6 of 20

7. 1 watt equals:

Question 7 of 20

8. More power is required when:

Question 8 of 20

9. Simple machines help to:

Question 9 of 20

10. Mechanical advantage is:

Question 10 of 20

11. A fixed pulley changes:

Question 11 of 20

12. Mechanical advantage of fixed pulley:

Question 12 of 20

13. Movable pulleys have MA:

Question 13 of 20

14. Inclined plane helps to:

Question 14 of 20

15. In inclined plane, effort is:

Question 15 of 20

16. Mechanical advantage of inclined plane:

Question 16 of 20

17. Lever is:

Question 17 of 20

18. Fulcrum is:

Question 18 of 20

19. Load arm is distance between:

Question 19 of 20

20. Effort arm is distance between:

Question 20 of 20


 

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