A 0.50-kg object moves on a horizontal frictionless circular track with a radius of 2.5 m.An external force of 3.0 N, always tangent to the track, causes the object to speed up as it goes around.If it starts from rest, then at the end of one revolution the radial component of the force of the track on it is:

Question

Quizplus · Accepted Answer

The radial force is the centripetal force required to keep the object moving in a circle. After one revolution, the work done by the tangential force equals the change in kinetic energy. Using work-energy principle and centripetal force formula, the radial force is calculated as 38 N.

A 050-Kg Object Moves on a Horizontal Frictionless Circular Track with with a Radius