A particle moves with position function 
Find the tangential component of the acceleration vector.
Definitions:
Conductor
A device or material that permits current to flow through it easily.
Circular Mil
An area measure of wire determined by squaring the diameter of the wire in mils (1 mil = 0.001 inch). Example: A wire with a diameter of 0.020 inch would have a circular mil area of 400 cmil (20 x 20 = 400).
Radius
A straight line from the center to the circumference of a circle or sphere.
Diameter
A straight line passing from side to side through the center of a body or figure, especially a circle or sphere, measuring the overall distance across.
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