A 050-Kg Mass Attached to the End of a String Swings

Multiple Choice

A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m) . When the mass is at the lowest point on the circle, the speed of the mass is 12 m/s. What is the magnitude of the force of the string on the mass at this position?

A) 31 N
B) 36 N
C) 41 N
D) 46 N
E) 23 N