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प्रश्न
What is a lever?
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उत्तर
A lever is a rigid rod that may be bent or straight and rotates around a point; it is known as a FULCRUM.
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संबंधित प्रश्न
Which class of lever will always have MA > 1 and why?
Draw a diagram of a lever which is always used as a force multiplier. How is the effort arm related to the load arm in such a lever?
The lever for which the mechanical advantage is less than 1 has :
A 4 m long rod of negligible weight is to be balanced about a point 125 cm from one end and a load of 18 kgf is suspended at a point 60 cm from the support on the shorter arm.
- If a weight W is placed at a distance of 250 cm from the support on the longer arm to balance the rod, find W.
- If a weight 5 kgf is kept to balance the rod, find its position.
- To which class of lever does it belong?
The following belong to which class of lever?
An oar of a boat
The following belong to which class of lever?
A pair of scissors
The following belong to which class of lever?
Knife
The following are an example of levers. State the class of lever to which each one belongs giving the relative positions of Load (L), Effort (E), Fulcrum (F):
(i) Scissors (ii) Sugar tongs (iii) Nutcracker (iv) Pliers.
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.
