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प्रश्न
The following are an example of levers. State the class of lever to which each one belongs giving the relative positions of Load (L), Effort (E), Fulcrum (F):
(i) Scissors (ii) Sugar tongs (iii) Nutcracker (iv) Pliers.
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उत्तर
| Name of Lever | Lever Class | Fulcrum | Position of Effort | Load | ||
| (i) | Scissors | First | At centre | One end | Other end | |
| (ii) | Sugar tongs | Third | One end | At centre | Other end | |
| (iii) | Nutcracker | Second | One end | Other end | At centre | |
| (iv) | Pliers | First | At centre | One end | Other end | |
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संबंधित प्रश्न
Give one example of a class I lever where mechanical advantage is more than one ?
Draw a diagram of a lever which is always used as a force multiplier. How is the effort arm related to the load arm in such a lever?
Fig 3.17 below shows a lever in use.
(a) To which class of lever does it belong?
(b) If FA = 80 cm, AB = 20 cm, find its mechanical advantage.
(c) Calculate the value of E.
Which type of levers have mechanical advantage always more than 1? Give reasons.
Give three examples for leavers of 1st order.
The following belong to which class of lever?
The Physical balance
The following belong to which class of lever?
Knife
When we want to use a machine as a force multiplier, which class of lever should we preferably use? Give a simple diagram of such a lever.
State the types (or kinds) of lever, and give two examples of each kind.
The length of a nut-cracker is 12 cm. A nut, when kept at a distance of 4 cm from its fulcrum, requires an effort of 100 gf to crack it. What force will be required to crack the nut without using the nut-cracker?
