| − | One slug is that mass which, when subjected to a force equivalent to a one-pound weight, will accelerate by one foot per second per second. Thus a pound is that force required to accelerate one slug of matter one foot per second per second. A slug would weigh thirty-two pounds on the ground, because the acceleration due to gravity at ground level on [[earth]] is thirty-two feet per second per second. | + | One slug is that mass which, when subjected to a force equivalent to a one-pound weight, will accelerate by one foot per second per second. Thus a pound is that force required to accelerate one slug of matter one foot per second per second. A slug would weigh thirty-two pounds on the ground, because the acceleration due to [[gravity]] at ground level on [[earth]] is thirty-two feet per second per second. |