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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
The diagram below shows a lever in use:
- To which class of levers does it belong?
- Without changing the dimensions of the lever, if the load is shifted towards the fulcrum what happens to the mechanical advantage of the lever?
Write down a relation expressing the mechanical advantage of a lever.
Draw a diagram of a lever which is always used as a force multiplier. How is the effort arm related to the load arm in such a lever?
The lever for which the mechanical advantage is less than 1 has :
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.
Which class of lever found in the human body is being used by a boy when he holds a load on the palm of his hand.
The following belong to which class of lever?
Human-arm
The following belong to which class of lever?
Wheelbarrow
A lever is used to multiply the force.
