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प्रश्न
Can a machine have an efficiency of 100%? Give a reason to support your answer.
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उत्तर
Efficiency of a machine is always less than 100% as output energy is always less than the input energy because some energy is lost to overcome friction.
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संबंधित प्रश्न
What do you understand by a machine?
Name six simple machines. Give an example of each machine.
show a nut cracker In the diagram, mark the position of the fulcrum F and the line of action of load L and effort E .
Give two examples of inclined plane where it is used to raise a heavy load with less effort ?
What is an ideal machine?
Define mechanical advantage (M.A.) of the machine.
What is the relationship between the mechanical advantage and the velocity ratio for:
(i) An ideal machine,
(ii) A practical machine.
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
Identify and mention the types of simple machines.
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 |
 |
| ______ | ______ | _______ |
 |
 |
 |
| ______ | ______ | ______ |
Simple machines usually exchange a larger force to move a heavy object.
