A 1.00 kg stone attached to a 1.00 m long string is traveling in a vertical circular path. What is the minimum linear speed needed at the top of the circle to keep the string from going slack?
A) 5.63 m/s
B) 5.31 m/s
C) 5.00 m/s
D) 4.50 m/s
E) 3.13 m/s

Question

Quizplus · Accepted Answer

The minimum speed at the top of the circle is determined by setting the gravitational force equal to the centripetal force required to keep the stone moving in a circle. Using the formula v = sqrt(g*r), where g = 9.81 m/s² and r = 1.00 m, the minimum speed is approximately 3.13 m/s.

A 100 Kg Stone Attached to a 1