What force causes earth's centripetal motion?
velocity
displacement
acceleration
gravity

What is the angular momentum of the bar about the axle?

How is zig zagging a form of acceleration?

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.