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A bucket full of water is tied at the en...

A bucket full of water is tied at the end of rope of length 1.6 m. It is rotated in vertical circle with constant speed around the other end. What should be the minimum speed of bucket so that water does not spill out at the highest position of the circle ?

A

16 `m//s`

B

4 `m//s`

C

8 `m//s`

D

2 `m//s`

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