An airplane propeller is 2.14 meter in length (from tip to tip) with mass 107 kilogram and is rotating at 2900rpm about an axis through its center. You can model the propeller as a slender rod. Obtain what is the kinetic rotational energy? Assume that, due to weight constraints, you had to reduce the propeller's mass to 75.0 percent of its original mass, but you still needed to keep the same size and kinetic energy. Determine what would its angular speed have to be?
in rpm