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प्रश्न
State the types (or kinds) of lever, and give two examples of each kind.
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उत्तर
There are three kinds of the lever, depending upon the different positions of the load, fulcrum and the effort.
Type I: When fulcrum is in the middle.
Type II: When the load is between the fulcrum and the effort.
Type III: When the effort lies between the fulcrum and load.
संबंधित प्रश्न
shows a nut cracker name the class of lever ?
Fig 3.17 below shows a lever in use.
(a) To which class of lever does it belong?
(b) If FA = 80 cm, AB = 20 cm, find its mechanical advantage.
(c) Calculate the value of E.
The following belong to which class of lever?
An oar of a boat
The following belong to which class of lever?
Pliers Tools
The following belong to which class of lever?
A claw-hammer
The following belong to which class of lever?
Rowing of a boat
The following belong to which class of lever?
Wheelbarrow
Shears, used for cutting metals and scissors used for cutting clothes are both examples of levers of the first order. However, whereas the shears always have short blades and long handles, the scissors often have blades much longer than the handles. Explain, why this is so?
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.
A crowbar of length 100 cm is used to lift a load of 5 kgf. It has its fulcrum at a distance of 20 cm from the load. Calculate:
(i) the mechanical advantage of a crowbar and,
(ii) the effort applied at the other end.
