Question

Question #c9b31

Answer 1

`F = m v^2 / r`

Explanation:

For a particle moving at constant speed in a circle, the magnitude of its inward radial acceleration is `a = v^2/r`, which is clearly a constant value. Bt Newton's Second Law, the magnitude of the accelerating force (also inward radial) is therefor `F = m v^2 /r`, again a constant value.

Because this is of constant magnitude, over any time period or distance, it is also the magnitude of the average force on the particle in a half revolution.