When a ceiling fan is switched off its angular velocity reduces to 50% while it makes 36 rotations. How many more rotation will it make before coming to rest (Assume uniform angular retardation)
Text Solution
Verified by ExpertsThe correct answer is:
B
By using equation 
⇒ ⇒ 
, ( n = 36) ..(i)
Now let fan completes total n ¢ ¢ revolution from the starting to come to rest
⇒ ⇒ 
substituting the value of a from equation (i)
revolution
Number of rotation = 48 – 36 = 12
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