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प्रश्न
What is a first-order lever?
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उत्तर
When the fulcrum is between the effort and the load,
it is known as the Class I lever.
Example: scissors, pliers, seesaw.
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संबंधित प्रश्न
State the principle of a lever?
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?
Give three examples for leavers of the third order.
The following belong to which class of lever?
Pliers Tools
The following belong to which class of lever?
Rowing of a boat
The following belong to which class of lever?
A pair of scissors
In the diagram shown alongside a claw hammer, mark the fulcrum (F) and indicate the directions of load (L) and effort (E) with arrows. What class of lever is it? Give one more example of this class of lever.
What is a lever?
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.
A lever is used to multiply the force.
