Please help me i need it it’s the only way i’ll pass

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.

What is the measurement of how fast an object moves relative to a reference point?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?