| Consider the following statements in this regard: |
| 1. The motion has a frequency of oscillation (i.e. pitching) of 3 cycles/minute. |
| 2. The motion has an angular frequency of 3.14 rad/s |
| 3. The angular velocity of precession of ship?s rotor is \[\frac{\pi }{300}\] rad/s |
| 4. The amplitude of pitching is \[\frac{\pi }{30}\] rad |
A) 1 and 2
B) 1, 2 and 4
C) 2, 3 and 4
D) 1, 3 and 4
Correct Answer: C
Solution :
Frequency of oscillation \[=\frac{60}{20}=3\,\,cpm\]Angular velocity of precession \[=\frac{2\pi }{20}\times \frac{\pi }{30}=\frac{{{\pi }^{2}}}{300}\text{rad/s}\] Amplitude of pitching \[=\frac{6\pi }{180}=\frac{\pi }{30}rad\]
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