A typical propeller of a turbine used to generate electricity from the wind consists of three blades as in the figure below. Each blade has a length of L = 30 m and a mass of m = 400 kg. The propeller rotates at the rate of 28 rev/min. 120% ----- (a) Convert the angular speed of the propeller to units of rad/s. rad/s (b) Find the moment of inertia of the propeller about the axis of rotation. (Treat each blade as a long, thin rod rotating about an axis perpendicular to its length and passing through its end.) J.s2 (c) Find the total kinetic energy of the propeller.

The jet engine has angular acceleration of -2.5 rad/s2. Which one of the following statements is correct concerning this situation? A If the angular velocity is counterclockwise, then its magnitude must increase as time passes. B) The direction of the angular velocity must be clockwise. c) The direction of the angular acceleration is counterclockwise. If the angular velocity is clockwise, then its magnitude must increase as time passes.

A spinning wheel steadily slows from an initial angular velocity of 1.60 rev/s to 0.490 rev/s in 10.2 s. (a) Calculate the wheel's angular acceleration in radians per second squared. 0.562 rad/s² (b) What angle does it go through during that time? rad

A wheel starts from rest and rotates with constant angular acceleration to reach an angular speed of 11.1 rad/s in 2.99 s. (a) Find the magnitude of the angular acceleration of the wheel. rad/s2 (b) Find the angle in radians through which it rotates in this time interval. rad