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प्रश्न
State three differences between the three classes of levers.
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उत्तर
| Class I | Class II | Class III | |
| 1. | It has the fulcrum between the load and effort. | It has the load between the fulcrum and effort. | It has an effort between the fulcrum and the load. |
| 2. | The effort arm can be shorter, equal to or longer than the load arm. | The effort arm is bigger than the load arm. | The effort arm is always shorter than the load arm. |
| 3. | The mechanical advantage can be less than, equal to, or greater than 1. | The mechanical advantages are always greater than 1. | The mechanical advantages are always less than 1. |
| 4. | The load and effort are in the same direction. | The load and effort are in opposite directions. | The load and effort are in opposite directions. |
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संबंधित प्रश्न
Fill in the blank:
In class II levers, the load is in between fulcrum and .........
Describe three orders of levers giving an example of each. Draw neat diagrams showing the positions of fulcrum, load, and effort in each kind of lever.
Name the class to which the following lever belong:
a see-saw
The diagram given below shows the three kinds of levers. Name the class of lever and give one example of the class.
Answer the following.
What is a Class I lever?
Give one example of a class I lever where mechanical advantage is less than 1.
Explain why the mechanical advantage of a class II of lever is always more than 1.
Class III levers have mechanical advantage less than one. Why are they then used?
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 |
