Question 1
One end of a string is attached to the ceiling and the other end is attached to a small sphere traveling in a circular path, as shown above, with a constant speed of 1 m/s. The string makes an angle of 30° to the vertical. If the tension in the string is 6 N and the circumference of the circle is 1 m, how much work is done on the sphere by the string as the sphere travels through one revolution?
A
0 J
B
3 J
C
6 J
D
12 J