1.

A particle of mass m is moving in a horizontal circle of radius r under a centripetal force equal to \[-K/{{r}^{2}}\], where K is a constant. The total energy of the particle is          [IIT 1977]

A.             \[\frac{K}{2r}\]          
B.             \[-\frac{K}{2r}\]
C.             \[-\frac{K}{r}\]           
D.             \[\frac{K}{r}\]
Answer» C.             \[-\frac{K}{r}\]           


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