Speed: s=d/t s: speed d: distance t: time Velocity: v=d/t v: velocity d: distance t: time Acceleration: a=(V1 - V0)/t a: acceleration t: time V0: velocity @ start V1: velocity @ end ------------------------------------------------------------------------------------ Gravity: 9.8 m/s^2 or 32 ft/s^2 Displacement: d = V0t + 1/2(at^2) d: displacement V0: original speed a: acceleration t: time ------------------------------------------------------------------------------------ Force: F=ma F: Force m: mass a: acceleration Newton: kg * m/s^2 1kg = 9.8N ------------------------------------------------------------------------------------ Momentum: kg * m/s N*s Ft = m(V1 - V0) F: Force t: time m: mass V0: velocity @ start V1: velocity @ end m(g)v(g) + m(b)v(b) = 0 ------------------------------------------------------------------------------------ Work: W = Fd W: Work F: Force d: distance ft*lb N*m Joule J ------------------------------------------------------------------------------------ Power: P = W/t P: Power W: Work t: time 1 J/s = 1 watt ------------------------------------------------------------------------------------ Potential Energy: PE = weight * height ------------------------------------------------------------------------------------ Kinetic Energy: KE = 1/2 mv^2 ------------------------------------------------------------------------------------ Law of Gravity: F ~ (m1 * m2)/d^2 d: distance between centers m1: mass of object 1 m2: mass of object 2 ------------------------------------------------------------------------------------ Mass Density vs Weight Density mass/volume weight/volume weight = British units ------------------------------------------------------------------------------------ Pressure: P = F/area P: Pressure F: Force ------------------------------------------------------------------------------------ Hooke's Law: F = k*x F: Force k: spring constant x: deformation (distance) ------------------------------------------------------------------------------------ Pressure in Liquid: P = depth * weight density weight density of water = 1000kg/m^3 or 9800 N/m^3 ------------------------------------------------------------------------------------ Buoyancy: 1 ft^3 H2O = 62.4 lbs (density object)/(density fluid) = % object under fluid ------------------------------------------------------------------------------------ Specific Gravity: (density substance)/(density water) density water = 1g/cm^3 ------------------------------------------------------------------------------------ C = (F-32)*5/9 F = (C*9/5)+32 K = C + 273.15 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------