Electrical current is defined as

the capacity to store charge

the flow of electrical charge per unit time

the amount of stored electrical energy

the voltage of the battery

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.