A student attaches a small ball of mass 100 g to the end of a string of length 60 cm. The student makes the ball execute circular motion in the horizontal plane with a frequency of 2.5 Hz.
a. a Calculate the i linear speed of the ball. ii tension in the string.
b. b In fact, it is not possible for anyone to make a ball on the end of a string execute circular motion in an exactly horizontal plane. i Explain why this must be the case. ii Draw a free-body force diagram for such a ball on the end of a string being rotated.
c. c Must the actual tension in the string be smaller, the same or larger than when the string is perfectly horizontal?
d. d Which component of the tension is acting as the centripetal force?
e. e What is the other component of the tension force doing?