Circular Motion Practice Test

A 0.10 kg object moves at constant speed in a horizontal circle of radius 0.40 m on a string. The object’s speed doubles while the radius stays the same. How does the required inward net force change?

A student swings a yo-yo on a string in a horizontal circle at constant speed. The yo-yo is momentarily at the point farthest east. Which statement about the net force on the yo-yo is correct?