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प्रश्न
The following belong to which class of lever?
An oar of a boat
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उत्तर
Second-class of lever
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संबंधित प्रश्न
Define Lever
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%?
Give three examples for leavers of second order.
Give three examples for leavers of the third order.
The following belong to which class of lever?
A see-saw
The following belong to which class of lever?
A fire tongs
The following belong to which class of lever?
Sugar tongs
The following belong to which class of lever?
A pair of scissors
The following belong to which class of lever?
Knife
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.
