Solve sample Problem 13.11, assuming that the elastic cord is replaced by a central force F of magnitude (80/r2) N directed toward O.

In SAMPLE PROBLEM 13.11

A sphere of mass m = 6kg is attached to an elastic cord of constant k = 100 N/m, which is un-deformed when the sphere is located at the origin O. Knowing that the sphere may slide without friction on the horizontal surface and that in the position shown its velocity vA has a magnitude of 20 m/s,

Determine
(a) The maximum and minimum distances from the sphere to the origin O,
(b) The corresponding values of its speed.

Transcribed Image Text:

VA 60° 0.5 m