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प्रश्न
What is a lever?
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उत्तर
A lever is a special case of the application of the law of moments. It is a rigid bar, straight or bent, which is capable of rotation about a fixed point or a fixed-line, called the axis of rotation. This fixed point or the axis of rotation is called the fulcrum. An effort E is applied at point A of the lever to overcome resistance (or load) at another point B, as shown in the diagram.
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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?
Name a machine to obtain gain in speed ?
Write down a relation expressing the mechanical advantage of a lever.
Class II levers are designed to have ______.
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 raises the weight of his body on his toes?
The following belong to which class of lever?
A see-saw
The following belong to which class of lever?
A claw-hammer
The following belong to which class of lever?
Rowing of a boat
What is a first-order lever?
