i. Force acting on a particle performing circular motion along the radius of circle and directed towards the centre of the circle is called centripetal force.
It is given by FCP = \(\cfrac{m\text v^2}r\)
where, r = radius of circular path.
ii. Example: Electron revolves around the nucleus of an atom. The necessary centripetal force is provided by electrostatic force of attraction between positively charged nucleus and negatively charged electron.
iii. Unit: N in SI system and dyne in CGS system.
iv. Dimensions: [M1 L1 T-2]
