Question

19. An electric fan rotating initally at
300
rpm comes to rest in 10 second
at conotant
angular retardatipn after it is switched off. The total
number of rotations made by it till
rest, is​

Answer 1

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Answer 2

Answer:

ωf=ωi +αt

0=3000/60+α(10)

α=−5 revolutions/s^2

ωf^2=ωi^2+2αΔθ

0=(3000/60) ^2+2×(−5)×Δθ

Δθ=250 revolutions

hope it helps u

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