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  • A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be:Opti

A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be:

Option: 1

7.5 rad


Option: 2

15 rad


Option: 3

20 rad


Option: 4

30 rad


Answers (1)

best_answer

For uniform acceleration,

Angle rotated by wheel in n^{\text {th }} second is

\mathrm{\theta_{n}=\left(\frac{\alpha}{2}\right)(2 n-1) }

\mathrm{Q_{1} \rightarrow} Angle rotated in 1st secend
\mathrm{\theta_{2} \rightarrow} Angle rotated in 2nd second 
\mathrm{\begin{aligned} \frac{\theta_{1}}{\theta_{2}} &=\frac{1}{3} \\ \theta_{2} &=15 \end{aligned} }  rad
The corred option is (2)

Posted by

Shailly goel

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