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PHYSICS-FORMULA SHEET Measurement distance displacement time speed velocity acceleration “Change in” subscript f =“Final ____” subscript i or o = “initial _____“ Acceleration due to gravity (9.8 m/s2) Mass Height Kinetic Energy Potential Energy Mechanical Energy Work Power Force (Many types of Forces) Net Force Weight Momentum Impulse Charge Voltage Current Resistance m Hz s Temperature Pressure Volume Variable Unit name written out Unit abbreviation x or d or h x or d t s v a Δ meters meters seconds miles/hour meters/second Meters/second squared ---------------------------------------Meters/second squared kilograms meters Newton*meter or joules Newton*meter or joules Newton*meter or joules Newton*meter or joules Watts Newton (kg*m/s2) Newton Newton Kilograms * meters/second Newtons*second Coulombs Volts Amperes (Amps) Ohms λ f T Kelvin (°C or °F) atm (kPa or ) Liters (ml or cm3) m m s mi/hr m/s m/s2 ------------------------------------------------------------m/s2 Kg m Nm or J Nm or J Nm or J Nm or J W N N N Kg m/s Ns C Voltage Current Ω Wavelength Frequency Period K (° ) atm (kPa or ) L (ml or cm3) f i or o g m h KE or EK PE or EP ME or EM W P F? Fnet W or Fg p Δp q V I R meters Hertz seconds T p v Semester 1 Velocity= displacement = v = Δd = df - di Time Δt t f - ti Speed = distance/time or d = vt Speed s = d/t Pythagorean Theorem a2 + b2 = c2 Average speed Slope Avg s = total distance Total time rise = Δ y = y2 – y1 run Δ x x2 - x 1 Kinetic Energy Potential Energy EK (KE) =1/2 mv2 Work- Energy Acceleration EP (PE) = m g h Epg (PEg) = m (9.8) h Work W = ΔE Wfriction = ΔME W=Fd Other Kinematic Equations d = vit + ½ at2 vf2 = vi2 + 2ad vf = vi + at a = Δv = vf - vi t t Mechanical Energy MEi = MEf PEi + KEi = PEf + KEf Power P = W/t P = W = Fd = mgd = Fv t t t Force Fnet = ma Or Fg = m g W=mg g = 9.8m/s2 Momentum p=mv (1hp=746W) Impulse Δp = Fnet t Fnet(t) = m(Δv) Fnet(t) = m(vf - vi) Conservation of Linear Momentum m1v1 = m2v2 (1 object) m1v1 + m2v2 = m1v1' + m2v2' (if 2 objects) Electricity V= I R Current I = q/ t Electrons = -1.6x10-19C Electric Power P=IV Semester 2 Waves v=f f = 1/T v=/T Sound Speed of Sound 340 m/s Light Electrostatics Electrons = -1.6x10-19C Total Charge=(#of electrons ) (charge of 1 electron) Series Circuit Voltage (v) Vt =V1+V2… Parallel Circuit Vt =V1 =V2 … Current (I) It=I1=I2… It = I1 + I2 … Resistance (R) RT = R1+R2… 1 = 1 +1 +1 Req R1 R2 R3 c=f c = 3 x108m/s speed of light in vacuum index of refraction = (speed of light in vacuum/ speed of light in material) n1sin(θ1) = n2sin(θ2) n=c/v Gas Laws P 1V 1 = P 2V 2 P 1V 1 = P 2V 2 T1 T2 SP = 1atm K = oC + 273 o F = 1.8 (oC) + 32 o C = (oF – 32)/1.8 V1 = V2 T1 = T2 P1 = P2 T1 T2 ST = 273K