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