If crank ab is rotating with an angular velocity of ωab = 6 rad/s , determine the velocity of the center o of the gear at the instant θ = 64 ∘.

Idont understand the question

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.