October 10, 2015

Homework Help: physics

Posted by will on Wednesday, October 19, 2011 at 5:57pm.

A mass of 0.04 kg is attached to a cord passing through a small hole in a frictionless, horizontal surface. The mass is initially orbiting with speed 4.9 m/s in a circle of radius 0.4 m. The cord is then slowly pulled from below, decreasing the radius of the circle to r2 = 0.09 m. Find the tension in the cord when the point mass is at r2.

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