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11.2 Exercise 21

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A propeller consists of two blades each 3.0 m in length and mass 120 kg each. The propeller can be approximated by a single rod rotating about its center of mass. The propeller starts from rest and rotates up to 1200 rpm in 30 seconds at a constant rate. (a) What is the angular momentum of the propeller at t=10s;t=20s?t = 10 \text{s}; t = 20 \text{s}? (b) What is the torque on the propeller?

OpenStax University Physics Volume 1, 11.2 Angular Momentum, exercise 21

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Adapted from University Physics Volume 1 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 1. Imported at revision db44eb9.