AP Physics 1easymcq1 pt
A 2 kg object is attached to a string and swung in a horizontal circle of radius 1.5 m with a constant speed of 4 m/s. What is the tension in the string?
A.5.3 N
B.8.0 N
C.10.7 N
D.21.3 N
Explanation
Core Concept
The tension in the string provides the centripetal force required for circular motion. Using F = mv²/r: F = (2 kg)(4 m/s)²/(1.5 m) = (2 kg)(16 m²/s²)/(1.5 m) = 32/1.5 N = 21.3 N.
Correct Answer
D21.3 N
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