Question

A propeller consists of two blades each 3.6 m in length and mass 108 kg each....

A propeller consists of two blades each 3.6 m in length and mass 108 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 1,210 rpm in 30 seconds at a constant rate. (Enter the magnitudes.) What is the angular momentum (in kg · m2/s) of the propeller at t = 10 s?

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Answer #1

To solve this problem , first we will calculate the Moment of Inertia of the Propeller.We will consider the propeller as a rod rotating around one of it's extreme . Then we will be calculating the angular acceleration of the propeller . From this we will calculate the Angular Momentum at t= 10 s using the formula

Therefore,

Angular Momentum at t= 10 s is 3.94 x 104 kg m2s-1

Hope this Helps!!

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