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Q.

Is it true that a fan continues to move sometimes even after it has been switched off?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
Newton's law of inertia is to blame. The Newton's law of inertia states that the fan is already rotating and that it will take some time for the rotation to stop (Newton’s law of inertia : An object continues to be in its state of motion until an external force is applied on ti to change its state of motion) The fan continues to move sometimes even after it has been switched off. This is because that fan has a tendency to move and continue in a circular motion when it has been switched off due to the inertia of motion. So, that is why the fan moves even after it has been switched off.
 
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