Waves, Energy, Machines and Power

1. POWER = work done/time taken

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2. The velocity ratio V.R of a hydraulic machine is equal to R squared/ r squared

Question 2 of 45

3. For a pendulum bob, the position of its maximum kinetic energy has zero potential energy and the position of its maximum potential energy has zero kinetic energy?

Question 3 of 45

4. State the Law of conversation of energy?

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5. How is the velocity ratio of a screw machine calculated?

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6. Running water, a speeding bullet, wind or a moving car possess which form of energy?

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7. Which simple machines depend on the principle of moments for them to work? (Clockwise moments=anticlockwise moments)

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8. Which of the following statement is CORRECT about efficiency?

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9. Mention any form of energy

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10. Energy spent is the product of force and distance i.e. F x D

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11. How is the V.R of Gears calculated?

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12. Which among the following is not a type of pulley?

Question 12 of 45

13. What is the SI UNIT of POWER?

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14. Give the velocity ratio V.R of a single movable pulley?

Question 14 of 45

15. The distance between 2 successive threads in a screw is called?

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16. The law of conservation of energy states also that the sum of kinetic energy and potential energy of a system is constant.

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17. What is the name of the force exerted by the machine?

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18. Which of the following is the ODD one out?

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19. Efficiency is the ratio of work done by the load to the work done on the effort?

Question 19 of 45

20. Which type of energy which can be recycled or reused over and over again and it cannot be exhausted?

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21. Name the form of energy which is contained in substances and be converted to heat by the process of oxidation (burning)

Question 21 of 45

22. Which of the following is not a non-renewable energy resource?

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23. Which type of energy is exhaustible and once its material is used it cannot be retrieved?

Question 23 of 45

24. A compressed string or compressed air in an air bottle possess which form of energy?

Question 24 of 45

25. The ratio of Load to effort is?

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26. What is the formula of elastic potential energy?

Question 26 of 45

27. Give the velocity ratio V.R of a single fixed pulley?

Question 27 of 45

28. What is the formula of gravitational potential energy P.E?

Question 28 of 45

29. Which of the following is not a type of wave energy?

Question 29 of 45

30. Give the velocity ratio V.R of a block and tackle pulley?

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31. The ratio of distance moved by effort to the distance moved by the load is?

Question 31 of 45

32. Which of the following statement is CORRECT about work?

Question 32 of 45

33. Which form of energy is produced by vibrating objects or particles i.e. when a wave is plucked?

Question 33 of 45

34. What is the name of the force applied to the machine?

Question 34 of 45

35. Mention 2 types of mechanical energy

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36. The velocity ratio V.R of a block and tackle pulley system is equal to no. of strings supporting the Load?

Question 36 of 45

37. A body due its relative position or state possess which form of energy?

Question 37 of 45

38. Which among the following is not among a SIMPLE MACHINE?

Question 38 of 45

39. What is POWER?

Question 39 of 45

40. A body in motion possess which form of energy?

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41. Which of the following is a class of levers?

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42. Which of the following is not a source of energy?

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43. Is the following formula correct 1Nm = 1 joule (J)?

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44. What is the name of the device that enables work to be done more easily or conveniently?

Question 44 of 45

45. Which form of energy flows from one region to another due to temperature difference?

Question 45 of 45