物理量(单位)公式备注公式的变形(国外英文资料).docVIP

物理量(单位)公式备注公式的变形(国外英文资料) Her collection of Feel very useful So upload to baidu Share it with you! The distortion of the formula of the formula of the quantity (unit) formula V (m/S) V = S: distance/t: time G = mg m: G: 9.8 N/kg or 10N/kg Density of rho is equal to m over V m: mass V: volume The net force is the same direction: F is equal to F1 plus F2 In the opposite direction: F is equal to F1 minus F2 in the opposite direction F1 F2 Buoyancy F floating (N) F float = G object - G depends on G: the weight of the object in the liquid Buoyancy F floating (N) F float = G object this formula applies only Objects float or float Buoyancy F floating (N) F float = G row = m G = rho liquid gV row G: the gravity of the liquid M: the quality of the liquid Rho fluid: the density of the liquid V: the volume of the liquid (that is, the volume in the liquid) Leverage balance condition F1L1 = F2L2 F1: power arm F2: resistance L2: resistance arm Lets set the pulley F equals G S = h F: the pull of the free end of the rope G: the gravity of the object S: the distance of the free end of the rope H: the distance of the object Lets take the pulley F = (G object + G) S = 2 h G thing: the force of gravity of the object G wheel: the gravity of the pulley Pulley block F = (G object + G) S = n h n: the number of segments of the pulley Mechanical work W (J) W = Fs F: force S: the distance traveled in the direction of the force A useful work W Total work W is equal to G object h W is equal to Fs for vertical placement of slides Mechanical efficiency eta = x 100% Power P (w) P = W: work T: time The pressure p (Pa) P = F: stress S: stress area Liquid pressure p (Pa) P = rho gh rho: the density of the liquid H: depth (from liquid level to request point Vertical distance Heat Q (J) Q = cm delta t c: the specific heat capacity m: mass Delta t: the change in temperature Fuel emission Heat Q (J) Q = mq m: mass Q: calorific value Common physics formulas and important knowledge points One. The physical