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प्रश्न
Explain why scissors for cutting cloth may have blades longer than the handles, but shears for cutting metals have short blades and long handles.
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उत्तर
- A pair of scissors used to cut a piece of cloth has blades longer than the handles, so the blades move longer on the cloth than the movement at the handles.
- Shears used for cutting metals have short blades and long handles because this enables us to overcome a large resistive force with a small effort.
संबंधित प्रश्न
Name the class to which the following lever belong:
a see-saw
Name the class to which the following levers belong:
a pair of pliers
Name the machine to which the following belong:
Sugar tongs
Tick the most appropriate answer.
Which of the following is a Class II lever?
Answer the following in short.
Using a suitable example, describe how a machine acts as a force multiplier.
What is the use of the lever if its mechanical advantage is
- more than 1,
- equal to 1, and
- less than 1?
Class III levers have mechanical advantage less than one. Why are they then used?
Classify the following into levers:
A door
Classify the following into levers:
Wheel barrow
Differentiate Class I lever and Class II lever.
