1. The problem statement, all variables and given/known data A small body of mass 0.51 kg is attached by a 0.52 m long cord to a pin set into the surface of a frictionless table top. The body moves in a circle on the horizontal surface with a speed of 2.1π m/s. (a) What is the magnitude of the radial acceleration of the body? m/s2 (b) What is the tension in the cord?