How many types of levers exist?

Class II lever, 35 kgf

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Class I lever, 37.5 kgf

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Class III lever, 37.5 kgf

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Class I lever, 35 kgf

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Solution

The correct option is B
Class I lever, 37.5 kgf

There are 3 types of levers :

First order : Fulcrum is at the centre, the load is at one end while effort is at other end.

Second order : Load is in centre, fulcrum is at one end while effort is on the other end.

Third order : Effort is in the centre, fulcrum at one end and load at the other end.

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Similar questions

A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand. State the kind of lever and calculate the effort needed.

A man uses a crowbar of length 2.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand. State the kind of lever used and calculate the effort needed.

The figure below shows a lever in use.

(a) To which class of lever does it belong?

(b) If AB = 1m, AF = 0.4 m, find its mechanical advantage.

Q. Which of the following are correct examples of first, second and third class levers?

	First class Lever	Second class Lever	Third class Lever
$I$	Scissors	Wheel barrow	Broom
$I I$	Ice Tongs	Tweezer	Paper cutter
$I I I$	Pliers	Nut cracker	Fishing rod

Q. Refer to the given figures, (A, B and C) and arrange them in an order of first class lever, second class lever and third class lever.

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