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A bucket tied at the end of a 1.6 m long string is whirled in a vertical circle with constant speed. What should be the minimum speed so that the water from the bucket does not spill, when the bucket is at the highest position (Take g = 10 m/sec2)

(a) 4 m/ sec (b) 6.25 m / sec (c) 16m / sec (d) None of these
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The correct answer is option  A) 4m/s  

Explaination :: 

\(V={\sqrt {gr}}\)

\(V=\sqrt{10×1.6}=\sqrt {16}\) 

V=4 m/s 

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