Caída Libre Se lanza un objeto hacia arriba con vi= 50 m/s, si tomamos la gravedad como 10m/s2, determine;
a) ¿Cuál es el tiempo que tarda en subir?
b) ¿a qué altura sube?

The charge of an ion with 55 protons and 52 electrons is +3. the reason is because protons are positive, and there are three more than the amount of negative electrons.

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.