Foot-poundals
The foot-poundal is the amount of energy required to move a one-pound mass a distance of one foot with an acceleration of one foot per second squared.
Kilojoules
A kilojoule (kJ) is equivalent to one thousand joules (J). It is the energy required when a force of one thousand newtons is applied over a distance of one meter, or one newton applied over a kilometer. In reality, a joule is roughly the energy required to lift a small apple one meter against Earth's gravity.