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प्रश्न
Define Lever
परिभाषा
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
What is a lever?
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.
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 1st order.
The following belong to which class of lever?
The Physical balance
The following belong to which class of lever?
An oar of a boat
The following belong to which class of lever?
A claw-hammer
The following belong to which class of lever?
Sugar tongs
Draw a labelled sketch of a second class lever. Give one example of such a lever.
What is a lever?
