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
Answer: C
Physics & Space Science
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