शाफ्ट की क्रांतिक गति क्या है यदि इसकी अनुप्रस्थ कंपन की प्राकृतिक आवृत्ति 2.85 Hz है?

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ESE Mechanical 2021 Official Paper
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  1. 171 rpm
  2. 285 rpm
  3. 570 rpm
  4. 142.5 rpm

Answer (Detailed Solution Below)

Option 1 : 171 rpm
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Detailed Solution

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संकल्पना:

समय-अवधि (T), कोणीय वेग (ω) और आवृत्ति (f) के बीच संबंध निम्न द्वारा दिया गया है:

\(T=\frac{2π}{ω}=\frac{1}{f}\)

हम जानते हैं कि कोणीय वेग (ω) को कोणीय गति (N) के रूप में दर्शाया जा सकता है:

\(ω=\frac{2π N}{60}\)

गणना:

दिया गया है कि:

f = 2.85 Hz

\(T=\frac{2π}{ω}=\frac{1}{f}\)

\(\frac{2π}{ω}=\frac{1}{f}\)

ω = 2πf ⇒ 2π × 2.85 Hz

\(ω=\frac{2π N}{60}\)

\(N=\frac{60}{2\pi}\times \omega\)

\(N=\frac{60}{2\pi}\times 2\pi\;\times2.85=171\;rpm\)

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