1.

A hollow Sphere of Mass 'M' and radius 'R' is rotating with an angular frequency of ω. It stops suddenly and the 75% of the Kinetic Energy is converted to heat. If 'S' is the specific heat of the material of sphere in S.I units, the rise in the temperature of the sphere is

A. \(\frac{{{R^2}{\omega ^2}}}{{4S}}\)
B. \(\frac{{3{R^2}{\omega ^2}}}{{10S}}\)
C. \(\frac{{{R^2}{\omega ^2}}}{{4JS}}\)
D. \(\frac{{2{R^2}{\omega ^2}}}{{3S}}\)
Answer» B. \(\frac{{3{R^2}{\omega ^2}}}{{10S}}\)


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