Question

An airplane propeller is 1.1 m in length (from tip to tip) and has a mass of 2.8 kg . When the airplane's engine is first started, it applies a constant torque of 8.1 N⋅m to the propeller, which starts from rest. What is the angular acceleration of the propeller? Treat the propeller as a slender rod. The unit of the angular acceleration is rad/s2

alpha = tau/I
You'll need to look up I for a rod spun around one end.

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