12.2.4—F = mrω2 and F = mv2 / r

The inward resultant force needed for circular motion is F=ma=mrω²=mv²/r.

Identify which real interaction supplies it—tension, gravity, friction or a normal force—and sum forces toward the centre.

A 2.0 kg mass moving at 3.0 m s⁻¹ around radius 1.5 m needs an inward resultant of 12 N.

Centripetal force is not an additional force to draw; it is the name for the inward resultant.