question_answer

A particle of mass m moves in a circular orbit of radius r under in action of an attractive force \[\frac{-{{K}^{2}}}{{{r}^{2}}}\] which always acts towards the centre r of the orbit. What is the total energy in the particle?

A)  \[\frac{k}{{{r}^{2}}}\]                   

B)         \[\frac{2k}{r}\]

C)  \[\frac{{{k}^{2}}}{r}\]                   

D)         \[\frac{k}{2r}\]