Question

A stone of mass m is tied to a string of length l and moved in a vertical circle. If g is the acceleration due to gravity, the minimum speed at highest point required to move it along the complete circle is _____

Answer 1

Answer:

Tension in string when it reach lower-most point

Tension in string when it reach lower-most pointT=mg+mω2r

Tension in string when it reach lower-most pointT=mg+mω2r=m(g+4π2n2r)             [as ω=2πn]

Tension in string when it reach lower-most pointT=mg+mω2r=m(g+4π2n2r)             [as ω=2πn]=m(g+4π2(60n)2r)

Explanation:

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