Centripetal Force Calculator
Find the inward net force needed for circular motion from mass, tangential speed and radius.
Formula
Fc = mv²/r.
Mass: 2 kg · Tangential speed: 3 m/s · Path radius: 1 m · Inward force ≈ (2 kg)×(3 m/s)^2÷(1 m)
How to use
- Enter mass and tangential speed.
- Enter positive radius of the circular path.
- Read the required inward force.
Examples
- 2 kg moving at 3 m/s on a 1 m radius needs 18 N inward.
Frequently asked questions
Is centripetal force an extra force?
No. It is the inward resultant of real forces such as tension, gravity or friction.
Can speed vary?
Yes. This gives the radial component at that speed; tangential force is separate.
What if the radius is zero?
Zero radius is undefined in this circular-motion model.
Sources
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