Question: Find the kinetic energy of the rotating body. Use the fact that the kinetic energy of a particle of mass m moving at a speed v is ½ mv2. Slice the object into pieces in such a way that the velocity is approximately constant on each piece.
- Find the kinetic energy of a rod of mass 10 kg and length 6 m rotating about an axis perpendicular to the rod at its midpoint, with an angular velocity of 2 radians per second. (Imagine a helicopter blade of uniform thickness.)