Nodding of head is an example

Class I lever

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Class II lever

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Class III lever

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All

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Solution

The correct option is A Class I lever
Class I lever in the action of nodding of head $: -$ the spine acts as the fulcrum, load is its front part, while effort is at its near part. Thus this is an example of class I lever.

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Similar questions

Perpendicular bisectors of the sides AB and AC of a triangle ABC meet at O.

(i) What do you call the point O?

(ii) What is the distance OA, OB and OC called?

(iii) Does the perpendicular bisector of BC pass through O?

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