Water Is Drawn from a Well in a Bucket Tied

question 106

Multiple Choice

Water is drawn from a well in a bucket tied to the end of a rope whose other end wraps around a cylinder of mass 50 kg and diameter 25 cm. As you turn this cylinder with a crank, the rope raises the bucket. If the mass of a bucket of water is 20 kg, what torque must you apply to the crank to raise the bucket of water at a constant speed?

• A) 24 N · m
• B) 2.5 N · m
• C) 80 N · m
• D) 2.4  103 N · m
• E) 49 N · m

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