Uniform Circular Motion: a 23 Kg Mass Is Connected to a Nail

Multiple Choice

Uniform circular motion: A 23 kg mass is connected to a nail on a frictionless table by a massless string 1.3 m long. There is no appreciable friction between the nail and the string. If the tension in the string is 51 N while the mass moves in a uniform circle on the table, how long does it take for the mass to make one complete revolution?

A) 4.8 s
B) 3.8 s
C) 4.5 s
D) 5.2 s