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प्रश्न
Stat the principle of an ideal machine.
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उत्तर
An ideal machine is a machine whose parts are weightless and frictionless so that which there is no dissipation of energy in any manner. Its efficiency is 100%, i.e. the work output is equal to work input.
संबंधित प्रश्न
With reference to the terms mechanical advantage, velocity ratio and efficiency of a machine, name and define the term that will not change for the machine of a given design.
What is the principle of an ideal machine?
Draw a diagram to show how a single pulley can be used so as to have its ideal M.A= 2.
Name a machine to multiply force ?
‘The force needed to push a load up an inclined plane is less than the force needed to lift it directly’ Give a reason.
The diagram below shows a claw hammer used to remove a nail :
(i) To which class of lever does it belong ?
(ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.
Give an example for each of the following uses of a machine:
to obtain gain in force,
Work is the application of a ....... through a distance.
Complete the following sentence :
Mechanical advantage = ___________ × velocity ratio
What is a machine?
