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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
What is a lever?
A lever of length 9 cm has its load arm 5 cm long and the effort arm is 9 cm long.
- To which class does it belong?
- Draw a diagram of the lever showing the position of fulcrum F and directions of both the load L and effort E.
- What is the mechanical advantage and velocity ratio if the efficiency is 100%?
- What will be the mechanical advantage and velocity ratio if the efficiency becomes 50%?
Which class of lever found in the human body is being used by a boy when he raises the weight of his body on his toes?
The following belong to which class of lever?
Human-arm
The following belong to which class of lever?
A fire tongs
The following belong to which class of lever?
Sugar tongs
The following belong to which class of lever?
A pair of scissors
In the following diagram of a wheelbarrow, mark the fulcrum (F) and indicate the directions of load (L) and effort (E) with arrows.
What class of lever is it? Give one more example of the same class of lever.
The diagram below shows a lever in use.
(i) To which class of lever does it belong?
(ii) If FA = 40 cm, AB = 60 cm, then find the mechanical advantage of the lever.
The diagram shows the use of a lever.
- State the principle of moments as applied to the above lever.
- Which class of lever is this? Give an example of this class of lever.
- If FA = 100 cm, AB = 90 cm, calculate the minimum effort required to lift the load.
