Auniform electric field of magnitude 31 v/m makes an angle of 30∘
with a displacement of length 10 m.
1)
what is the potential difference of the final position relative to the initial position of this displacement? (express your answer to two significant figures.)

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.