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What is a lever ? State its principle....

What is a lever ? State its principle.

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ICSE-MACHINES-EXERCISE-3(A)
  1. How is mechanical advantage related with velocity ratio for an actual ...

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  2. State one reason why mechanical advantage is less than the velocity ra...

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  3. What is a lever ? State its principle.

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  4. Write down a relation expressing the mechanical advantage of a lever.

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  5. Name the three classes of levers and state how are they distinguished....

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  6. Give one example each of a class I lever where mechanical advantage is...

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  7. What is the use of a lever if its mechanical advantage is (a) more tha...

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  8. Both a pair of scissors and a pair of pliers belong to the same class ...

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  9. Explain why scissors for cutting cloth may have blades longer than the...

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  10. Figure, shows a uniform metre rule of weight W supported on a fulcrum ...

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  11. Which typ eof lever has mechanical advantage always more than 1 ? Give...

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  12. Draw a diagram of a lever which is always used as a force multiplier. ...

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  13. Explain why mechanical advantage of a class II lever is always more th...

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  14. Draw a labelled diagram of a class II lever. Give one example of such ...

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  15. Figure, shows a lemon crushes, (a) In the diagram, mark the position...

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  16. The diagram below shows a rod lifting a stone. (a) Mark position of ...

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  17. State the kind of lever which always has mechanical advantage less tha...

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  18. Explain why mechanical advantage of class III lever is always less tha...

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  19. Class III levers have mechanical advantage less than 1. why are they t...

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  20. Draw a labelled sketch of a class III lever. Give one example of this ...

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