FIGURE 6-15 -A 20.0-Gram Mass Is Attached to a 120 Cm-Long String

Multiple Choice

FIGURE 6-15
-A 20.0-gram mass is attached to a 120 cm-long string as shown in Figure 6-15. It moves in a horizontal circle with a constant speed of 1.50 m/s. What is the angle α?

A) 10.8°
B) 13.5°
C) 17.7°
D) 24.6°
E) 49.2°