A 2000 kg single-engine airplane accelerates from 20 m/s to 70 m/s in 4 seconds. Assuming the engine produced a constant force, how much force was applied by this engine?

Ithink the answers is b i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

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.

Assuming you're referring to significant figures, none of these answer choices are shown to be zero as significant digits. did you, by chance, forget to add something?