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प्रश्न
Give an example of each class of lever in a human body.
उत्तर
- Class I lever in the action of nodding of the head: In this action, the spine acts as the fulcrum, load is at its front part, while effort is at its rear part.
- Class II lever in raising the weight of the body on toes: The fulcrum is at the toes at one end, the load is in the middle and effort by muscles is at the other end.
- Class III lever in raising a load by forearm: the elbow joint acts as a fulcrum at one end, the biceps exert the effort in the middle and a load on the palm is at the other end.
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संबंधित प्रश्न
What type of lever is formed by the human body while raising a load on the palm?
What type of lever is formed by the human body while raising the weight of body on toes?
Indicate the positions of load L, effort E and fulcrum F in the forearm shown alongside in following figure. Name the class of lever.
Draw a labelled sketch of a class III lever. Give one example of this kind of lever.
State the class of levers and the relative positions of load (L) effort (E) and fulcrum (F) in a bottle opener?
State the class of levers and the relative positions of load (L), effort (E) and fulcrum (F) in sugar tongs.
Name a machine which is used to multiply speed.
Which of the following is a class III lever?
