Centripetal Motion Explorer
Watch an object orbit in a circle with animated force and velocity arrows. Adjust radius, mass, and speed to explore centripetal acceleration and force.
Frequently Asked Questions
What is centripetal force?
Centripetal force is the inward-pointing force that keeps an object moving in a circle. It is not a separate type of force — it can be gravity (for planets), friction (for cars), or tension (for a ball on a string).
Why does doubling the speed quadruple the centripetal force?
The centripetal force formula is F = mv²/r. Because velocity is squared, doubling v means the force becomes 2² = 4 times as large. This is why taking a curve too fast is so dangerous.
What is the difference between centripetal and centrifugal force?
Centripetal force is the real inward force causing circular motion. Centrifugal force is the apparent outward push you feel in a rotating frame of reference — it is not a real force but an effect of inertia.
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