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प्रश्न
What is a lever?
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उत्तर
A lever is a simple machine consisting of a rigid rod that is capable of turning around a pivot called a fulcrum. It has three parts, namely effort, load, and fulcrum.
- Fulcrum: The rod of the lever rests on it and the lever rotates about it.
- Load: The weight lifted by the liver is called the load.
- Effort: The force applied on the other end of the rod to lift the load is called the effort.
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संबंधित प्रश्न
Define the term ‘work input’ and ‘work output’ in relation to a machine.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
Answer the following.
What is a machine?
Why is a machine not 100% efficient?
What is an ideal machine?
Define mechanical advantage (M.A.) of the machine.
Give an example of the following use of a machine to change the point of application of the force.
Classify the following as a lever, a pulley and an inclined plane:
The wheel of a flagpole
Classify the following as a lever, a pulley and an inclined plane:
A knife
Identify and mention the types of simple machines.
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 |
 |
| ______ | ______ | _______ |
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 |
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| ______ | ______ | ______ |
