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प्रश्न
Give one example of a class I lever where mechanical advantage is more than one ?
उत्तर
More than one: shears used for cutting the thin metal sheets .
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संबंधित प्रश्न
Write down a relation expressing the mechanical advantage of a lever.
The lever for which the mechanical advantage is less than 1 has :
Class II levers are designed to have ______.
A lever of length 9 cm has its load arm 5 cm long and the effort arm is 9 cm long.
- To which class does it belong?
- Draw a diagram of the lever showing the position of fulcrum F and directions of both the load L and effort E.
- What is the mechanical advantage and velocity ratio if the efficiency is 100%?
- What will be the mechanical advantage and velocity ratio if the efficiency becomes 50%?
Which type of levers have mechanical advantage always more than 1? Give reasons.
Give three examples for leavers of second order.
The following belong to which class of lever?
The Physical balance
The following belong to which class of lever?
Wheelbarrow
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.
