Chapter 9 Simple Machine - Test 3


1. The first foremost simple machine is

1) lever
2) Inclined plane
3) Wheel
4) pulley
2. The point around which lever is rotated is

1) pulley
2) Fulcrum
3) a.effort arm
4) load arm
3. M. A of screw Jack

1) M.A= Load
2) M.A=R
3) M.A = 1
4) M.A 2Pi l/h
4. The force applied on the machine for doing work is called__________

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5. Things which help in doing work are called _________

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6. The weight lifted by a machine is called ____________

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7. The work done by the force applied on the machine is called __________

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8. Work = Force x ________

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9. The work done by the machine are called _________

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10. Percentage efficiency = output x 100

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11. A bar which can move around any point is called _________

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12. Judo game of Japanese is based on the Principal of _________

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13. The point at which lever moves is called ________

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14. The moment of effort is the product of effort and _________

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