- the foot-pound-second unit of force, equal to the force that produces an acceleration of one foot per second per second on a mass of one pound. Abbreviation: pdl
- the fps unit of force; the force that imparts an acceleration of 1 foot per second per second to a mass of 1 pound. 1 poundal is equivalent to 0.1382 newton or 1.382 × 10 4 dynes
