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

Question

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

Quizplus · Accepted Answer

The Answer of 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

An Object Attached to the End of a String Swings