A stone of mass 5kg is tied to a string of length 2.5m, is whirled round in a horizontal circle. What is the maximum angular velocity with which the stone can be whirled around, if the string can withstand a maximum tension of 1250N ?
A
30rad/s
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B
20rad/s
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C
10rad/s
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D
5rad/s
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Solution
The correct option is C10rad/s It is given that the breaking tension of string (Tmax)=1250N.
To find maximum angular velocity ωmax: Tmax=mlω2max
where (l) is length of the string.