A blue slime ball with mass of 4.5 kg, is traveling to the right at 16 m/s. At the same time, a yellow slime ball with mass of 5.3 kg, is traveling to the
left at 4 m/s. When the slime balls collide, they form one larger green
Slime ball. What is the velocity of the green slime ball?

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Sorry i don’t know what to do

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.