A Propeller Is Spun Up from Rest to 1500 Rpm

question 48

Multiple Choice

A propeller is spun up from rest to 1500 rpm in 15.0 s under the influence of a constant torque. If the work done by the engine in giving the propeller its final angular velocity is 25 kJ, what is the torque supplied by the engine?

• A) 21 N·m
• B) 11 N·m
• C) 42 N·m
• D) 3.4 N·m
• E) 130 N·m

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