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A jack screw is provided with a long arm...

A jack screw is provided with a long arm. Explain why?

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ICSE-FORCE -EXERCISE 1A
  1. State one way to reduce the moment of a given force about a given axis...

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  2. State one way to obtain a greater moment of a force about a given axis...

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  3. Why is it easier to open a door by applying the force at the free end ...

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  4. The stone of a hand flour grinder is provided with a handle near its r...

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  5. It is easier to turn the steering wheel of a large diameter than that ...

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  6. A spanner (or wrench) has a long handle. Why?

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  7. A jack screw is provided with a long arm. Explain why?

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  8. A, B and C are three forces each of magnitude 4N acting in the plane o...

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  9. The adjacent diagram Fig 1.27 shows a heavy roller, with its axle at O...

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  10. A body is acted upon by two forces each of magnitude F, but in opposit...

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  11. Draw a neat labelled diagram to show the direction of two forces actin...

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  12. What do you understand by the term couple? State its effect .Give two...

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  13. Define moment of couple. Write its S.I unit.

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  14. Prove that Moment of couple= Force times couple arm

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  15. What do you mean by equilibrium of a body?

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  16. State the condition when a body is in (i) static, (ii) dynamic equilib...

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  17. State two conditions for a body, acted upon by several forces, to be i...

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  18. State the principle of moments, Name one device based on it.

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  19. Describe a simple experiment to verify the principle of moments, if yo...

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  20. Complete the following sentences: (i) The S.I unit of moment of forc...

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