used as the unit of mass in a metre–gram-force–second (mgfs) system. 1 TME = 1 kp / 1 m/s2 = 1 kp⋅s2/m = 1 hyl = 1 kp⋅s2/m = or 1 hyl (alternate definition – mgfs) = 1 p⋅s2/m = Pressure The gravitational unit of pressure is the technical atmosphere (at). It is the gravitational force of one kilogram, i.e. 1 kgf, exerted on an area of one square centimetre. 1 at = 1 kp/cm2 = 10 000 × gn kg/m2 = 98 066.5 kg/(m⋅s2) = 98.066 5 kPa Energy There is no dedicated name for the unit of energy, "metre" is simply appended to "kilopond", but usually the symbol of the kilopond-metre is written without the middle dot. 1 kpm = 1 kp⋅m = gn kg⋅m = 9.806 65 kg⋅m2/s2 = 9.806 65 J Power In 19th-century France there was as a unit of power, the poncelet, which was defined as the power required to raise a mass of 1 quintal (1 q = 100 kg) at a velocity of 1 m/s. The German or metric horsepower (PS, Pferdestärke) is arbitrarily selected to be three quarters thereof. 1 pq = 1 qf⋅m/s = 100 kp⋅m/s = 100 × gn kg⋅m/s = 980.665 kg⋅m2/s3 = 0.980 665 kW 1 PS = pq = 75 kp⋅m/s = 75 × gn kg⋅m/s = 735.498 75 kg⋅m2/s3 = 0.735 498 75 kW See also List of metric units References Systems of units Gravitational metric system