Centripetal Force Calculation

Centripetal force = mass x velocity^2 / radius


Note that the conditions here assume no additional forces, like a horizontal circle on a frictionless surface. For a vertical circle, the speed and tension must vary.

Any of the data values may be changed. When finished with data entry, click on the quantity you wish to calculate in the formula above. Unit conversions will be carried out as you enter data, but values will not be forced to be consistent until you click on the desired quantity.

Calculation for:
Radius r = m = ft
Mass = m=kg = slugs
Weight = W=N = lbs
Velocity = v=m/s = ft/s
or in common highway speed units,
velocity = km/h = mi/h


Centripetal force= F=N = lbs

Discussion of concept

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Centripetal Acceleration on Elevator

The centripetal acceleration expression is obtained from analysis of constant speed circular motion by the use of similar triangles. From the ratio of the sides of the triangles:

For an altitude on the Elevator of km,
(velocity km/s)
the centripetal acceleration is m/sē. ( g)
The acceleration of gravity is g = m/s2 = g
The effective gravity is g = m/s2 = g
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Modified by Bob Munck for SE