A particle describes a circular motion in horizontal plane in a conical funnel with speed v, the height of plane of circle from bottom is 40 cm, find v.
A
4m/s
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B
8m/s
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C
1m/s
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D
2m/s
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Solution
The correct option is D2m/s Ncosθ=mv2r Nsinθ=mg tanθ=rgv2=/rgv2=/rh v2=gh=√gh=2m/s