A) 1.3
B) 0.4
C) 27.0
D) None of these
Correct Answer: D
Solution :
| Bonus \[\zeta \le \sqrt{5gr}\] |
| \[\omega \frac{v}{r}\le \sqrt{\frac{5g}{r}}=\sqrt{\frac{50\times 8}{10}}=\sqrt{\frac{400}{10}}\] |
| \[\omega =\sqrt{40}\] rad/s |
| \[=\frac{60\sqrt{10}}{\pi }\]rpm |
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