A Stone Weighing 5 Pounds Is Attached to the End

Multiple Choice

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