Question
Download Solution PDFThe angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular acceleration in rad/s2 is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
According to the uniform circular motion, the equation of motion is written as;
ω = ωo + α t
Here, ω is the final angular speed, ωo the initial angular speed, t is the time taken, α is angular acceleration.
CALCULATION:
Given: initial angular speed ωo = 1200 rpm
final angular speed, ω = 3120 rpm
t = 16 sec.
The initial angular speed, ωo = 1200 rpm
ωo =
= 40 π rad/sec.
Similarly,
The final angular speed ω = 3120 rpm
=
= 104π rad/sec.
Now, using ω = ωo + α t which is
⇒
⇒
Hence option 3) is the correct answer.
Last updated on Jun 16, 2025
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