Advertisements
Advertisements
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.
Advertisements
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
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 pair of scissors
Name the class to which the following lever belong:
a pair of sugar tongs
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 nutcracker
Answer the following in short.
What is the basis of the classification of levers?
Explain why the mechanical advantage of a class II of lever is always more than 1.
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?
Differentiate Class I lever and Class II lever.
