An Object Attached to the End of a String Swings

question 39

Multiple Choice

An object attached to the end of a string swings in a vertical circle (R = 1.2 m) , as shown. At an instant when θ = 30°, the speed of the object is 5.1 m/s and the tension in the string has a magnitude of 20 N. What is the mass of the object?

• A)2.0 kg
• B)1.5 kg
• C)1.8 kg
• D)1.2 kg
• E)0.80 kg

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