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प्रश्न
Give three examples for leavers of the third order.
उत्तर
Levers of third order:
(i) Cutting bread with a knife.
(ii) A boy writing on a piece of paper
(iii) Forceps
(iv) A fishing rod.
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संबंधित प्रश्न
What is a lever?
Class II levers are designed to have ______.
The following belong to which class of lever?
A see-saw
The following belong to which class of lever?
A claw-hammer
The following belong to which class of lever?
Rowing of a boat
The following belong to which class of lever?
A fire tongs
The following belong to which class of lever?
Wheelbarrow
In the diagram shown alongside a claw hammer, mark the fulcrum (F) and indicate the directions of load (L) and effort (E) with arrows. What class of lever is it? Give one more example of this class of lever.
The length of a nut-cracker is 12 cm. A nut, when kept at a distance of 4 cm from its fulcrum, requires an effort of 100 gf to crack it. What force will be required to crack the nut without using the nut-cracker?
A crowbar of length 100 cm is used to lift a load of 5 kgf. It has its fulcrum at a distance of 20 cm from the load. Calculate:
(i) the mechanical advantage of a crowbar and,
(ii) the effort applied at the other end.
