A 1000 kg roller coaster car moves from point a to b and c. What is the potential energy at b and c relative to a?

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 distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums