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प्रश्न
Class III levers have mechanical advantage less than one. Why are they then used?
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उत्तर
With levers of class III, we do not get gain in force, but we get gain in speed, that is a longer displacement of load is obtained by a smaller displacement of effort.
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संबंधित प्रश्न
Fill in the blank:
In class II levers, the load is in between fulcrum and .........
Give one example of a class I lever where the mechanical advantage is more than 1.
Name the class to which the following levers belong:
a pair of pliers
Draw diagram to illustrate the position of fulcrum, load, and effort, of the following:
a pair of forceps
Name the machine to which the following belong:
Lemon crusher
Answer the following.
State the principle of levers.
Tick the most appropriate answer.
Which of the following is a Class II lever?
Explain why the mechanical advantage of the class III type of lever is always less than 1.
Lemon juicer belongs to which type of lever? Why?
Match the following:
| 1. | Class I lever | a. | Wheelbarrow |
| 2. | Class II lever | b. | Seesaw |
| 3. | Class III lever | c. | Axe |
| 4. | Wedge | d. | Hockey sick |
