What part of an electric motor transforms electrical energy into mechanical energy

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Which of the following are guidelines to follow for obtaining accurate observations

Energy flows from the producer level to the level. is called