Question

A 650g ball on the end of a light rod is rotated in a horizontal circle of 1.2m radius.Calculate the torque needed to keep the ball rotating if the air resistance exerts a force of .02N on the ball. Ignore the moment of inertia and the air resistance of the rod.
Huh?
.02*1.2

Since speed is constant, no tangential acceleration and I is not relevant and m is not relevant.

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