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?
1) 31 N
2) 36 N
3) 41 N
4) 46 N
5) 23 N
Answer: 3