Work Done by Centripetal Force
Category : JEE Main & Advanced
The work done by centripetal force is always zero as it is perpendicular to velocity and hence instantaneous displacement.
Work done = Increment in kinetic energy of revolving body
Work done = 0
Also \[W=\vec{F}.\vec{S}=F.S\cos \theta =F.S\,\,cos\,\,{{90}^{o}}=0\]
Example : (i) When an electron revolves around the nucleus in hydrogen atom in a particular orbit, it neither absorb nor emit any energy means its energy remains constant.
(ii) When a satellite established once in a orbit around the earth and it starts revolving with particular speed, then no fuel is required for its circular motion.
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