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प्रश्न
What is a machine?
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उत्तर
A machine is a device by which we can overcome resistance by applying a comparatively small force at a convenient point and in the desired direction or obtain a gain in speed.
संबंधित प्रश्न
What is the principle of an ideal machine?
State four ways in which machines are useful to us.
Name a machine to change the point of application of 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.
What is the purpose of a machine?
Give an example for each of the following uses of a machine:
to obtain gain in force,
Stat the principle of an ideal machine.
Complete the following sentence :
Mechanical advantage = ___________ × velocity ratio
Under what condition will a set of gears produce a gain in speed
