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प्रश्न
Define the term ‘work input’ and ‘work output’ in relation to a machine.
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उत्तर
Work input is work done on a machine equal to the effort force times the distance through which the force is applied.
Work output is work that is done by a machine and equals resistance force times the distance through which the force is applied.
For an ideal machine, the work output is equal to the work input, i.e., the efficiency.
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संबंधित प्रश्न
Select the correct alternative:
For an ideal machine, the efficiency is
Can a machine have an efficiency of 100%? Give a reason to support your answer.
A machine is 75% efficient’. What do you understand by this statement?
Answer the following.
What is a 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 .

What is an ideal machine?
Can a machine be 100% efficient?
Define mechanical advantage (M.A.) of the machine.
How does a machine work?
Identify and mention the types of simple machines.
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