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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
Select the correct alternative:
For an ideal machine, the efficiency is
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The mechanical advantage of an inclined place is always:
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(b) equal to 1
(c) greater than 1
(d) nothing can be said
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(ii) What is the velocity ratio of the system?
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The wheel of a flagpole
What is meant by simple machines?
