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प्रश्न
Define Lever
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उत्तर
Lever: A lever is a rigid, straight or bent bar which is capable of turning about a fixed axis.
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संबंधित प्रश्न
Which class of lever will always have MA > 1 and why?
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?
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand.
- Draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their directions.
- State the kind of lever.
- Calculate:
- load arm,
- effort arm,
- mechanical advantage and
- the effort needed.
Give three examples for leavers of 1st order.
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?
Sugar tongs
The following belong to which class of lever?
Nutcracker
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.
