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प्रश्न
Give three examples for leavers of the third order.
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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.
संबंधित प्रश्न
Name a machine to obtain gain in speed ?
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.
- Draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their directions.
- State the kind of lever.
- Calculate:
- load arm,
- effort arm,
- mechanical advantage and
- the effort needed.
Define Lever
Which class of lever found in the human body is being used by a boy when he raises the weight of his body on his toes?
The following belong to which class of lever?
The Physical balance
The following belong to which class of lever?
Human-arm
The following belong to which class of lever?
Fore-arm
Draw a labelled sketch of a second class lever. Give one example of such a lever.
State the types (or kinds) of lever, and give two examples of each kind.
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?
