A 0.20-kg object attached to the end of a string swings in a vertical circle (radius = 80 cm). At the top of the circle the speed of the object is 4.5 m/s. What is the magnitude of the tension in the string at this position?
a. 7.0 N
b. 2.0 N
c. 3.1 N
d. 5.1 N
e. 6.6 N
C
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