(physics) the influence that produces a change in a physical quantity

direct toward itself or oneself by means of some psychological power or physical attributes

apply force so as to cause motion towards the source of the motion

the amount of horizontal force available to a vehicle at the drawbar for accelerating or pulling a load.

the force (in tons or kiloNewtons (kN)) exerted by a vessel under full power, on a shore-mounted bollard through a tow-line, commonly measured in a practical test.