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When does a body rotate? State one way t...

When does a body rotate? State one way to change the direction of rotation of the body. Give a suitable example to explain your answer.

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ICSE-FORCE -EXERCISE 1A
  1. State whether the moment of force is a scalar or vector quantity.

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  2. State two factors affecting the turning effect of a force.

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  3. When does a body rotate? State one way to change the direction of rota...

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  4. Write the expression for the moment of force about a given axis.

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  5. What do you understand by the clockwise and anticlockwise moment of fo...

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  6. State one way to reduce the moment of a given force about a given axis...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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