A stone weighing 5 pounds is attached to the end of a five-foot string and is whirled horizontally with one end held fixed. It makes 1 revolution per second. Find the work done by the force F that keeps the stone moving in a circular path.
[Hint: Use Force = (mass)(centripetal acceleration).] Round your answer to two decimal places, if required.
A) 1,570.80
B) 0.00
C) 7,853.98
D) 2,500.00
E) 78.54

Question

Quizplus · Accepted Answer

Work done in a circular path, where the direction of force is perpendicular to the direction of displacement, is zero because the force does not act in the direction of motion.

A Stone Weighing 5 Pounds Is Attached to the End