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प्रश्न
Answer the following.
State the principle of levers.
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उत्तर
The principle of a lever states that the product of the load and the load arm is always equal to the product of the effort and the effort arm.
Load x Load arm = Effort x Effort arm Load Effort arm
`"Load "/ "Effort"`= `"Effort arm"/"Load arm"`
The above ratio is called the mechanical advantage of a lever.
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संबंधित प्रश्न
Which class of lever has the mechanical advantage always more than 1? Give an example.
Which class of lever has the mechanical advantage always less than 1? Give an example.
Give one example of a class I lever in a case where the mechanical advantage is less than 1?
How does the friction at the fulcrum affect the mechanical advantage of the lever?
Answer the following in short.
Using a suitable example, describe how a machine acts as a force multiplier.
Draw a labelled diagram of a class II lever. Give one example of such a lever.
Class III levers have mechanical advantage less than one. Why are they then used?
Shows a lemon crusher. Name the class of lever.
The diagram below shows a rod lifting a stone.
- Mark position of fulcrum F and draw arrows to show the directions of load L and effort E.
- What class of lever is the rod?
- Give one more example of the same class of lever stated in part (b).
Classify the things below.
| Sl. No | Examples | Class of Lever |
| 1. | Spade | |
| 2. | Seesaw | |
| 3. | Wheel barrow | |
| 4. | Plier | |
| 5. | Nail cutter |
