A body of mass 1.00 kg is tied to a string and rotates on a horizontal, frictionless table.
a. a The length of the string is 40.0 cm, and the speed of revolution is 2.0 m s−1 . Calculate the tension in the string.
b. b The string breaks when the tension exceeds 20.0 N. Determine the largest speed at which the mass can rotate.
c. c The breaking tension of the string is 20.0 N, but you want the mass to rotate at 4.00 m s−1 . Determine the shortest length of string that can be used.