A Stone Weighing 2 Pounds Is Attached to the End $201.06 \mathrm { ft } \cdot \mathrm { lbs }$

question 25

Multiple Choice

A stone weighing 2 pounds is attached to the end of a four-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) \(201.06 \mathrm { ft } \cdot \mathrm { lbs }\)
• B) \(0.00 \mathrm { ft } \cdot \mathrm { lbs }\)
• C) \(804.25 \mathrm { ft } \cdot \mathrm { lbs }\)
• D) \(256.00 \mathrm { ft } \cdot \mathrm { lbs }\)
• E) \(12.57 \mathrm { ft } \cdot \mathrm { lbs }\)

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