The push or pull that alters the motion of a moving body or moves a stationairy body; the unit of force is the dyne or poundal; force is equal to mass time velocity divided by time.
Unforeseeable events, beyond the control of participants in a contract, which may excuse either side.
The title of a common clause in contracts, exempting the parties for non-fulfillment of their obligations as a result of conditions beyond their control, such as earthquakes, floods or war.
A type of heating system in which heated air is blown by a fan through air channels or ducts to rooms.
A fan that generates (by pushing) a flow of ambient air over the exterior of the finned pipes to dissipate the sensible heat.
A type of building ventilation system that uses fans or blowers to provide fresh air to rooms when the forces of air pressure and gravity are not enough to circulate air through a building.
Sails that lie in the direction of the ship's length and whose luffs abut the masts or are attached to stays.
The headway a vessel makes when luffed in the wind; the distance a sailing vessel will shoot up to windward when brought head to head in the act of tacking.