Physics Equation Help Sheets.pdf, Schemes and Mind Maps of Physics

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Physics Equation Help Sheets Lower Level Equations Equations you need to Remember  The unit for Force is the 1) F=ke 1) Force = Spring Constant times Extension 2) k=F/e 2) Spring Constant = Force divided by Extension 3) e=F/k 3) Extension = Force divided by Spring Constant Newton N Spring Constant __ Newtons per Metre N/m or Kilograms per Second Square kg/s or kgs Extension Metre m Mi 1) M=Fd 1) Moment = Force times Distance 2) F=M/d 2) Force = Moment divided by Distance d 3)d=M/F 3) Distance = Moment divided by Force The unit for Moment ___is the Newton Metres Nm Force Newton N Distance Metres m F 1) p=F/a 2) F=pa a 3)a=F/p 1) Pressure = Force divided by area 2) Force = Pressure times Area 3) Area = Force divided by Area The unit for Pressure is the Pascal Pa Force Newton N Area Metres squared m2 F 1)F=ma 1) Force = Mass times Acceleration 2) m=F/a 2) Mass = Force divided by Acceleration mM a 3)a=F/m 3) Acceleration = Force divided by Mass The unit for Force is the Newton N Mass. Kilogram kg Acceleration Metres per Second squared m/s*ms# M mM The unit for 1)M=mv 1) Momentum = Mass times Velocity 2)m=M/v 2) Mass = Momentum divide by Velocity 3)v=M/m 3) Velocity = Momentum divided by Mass Momentum ___is the Kilogram-Metre per Second kgm/s or kgms* Mass Kilogram kg Velocity Metres per Second m/s or ms* IE = */,mv? 1) Kinetic Energy = Half Mass times Velocity squared 2)m= 2E, /v? 2) Mass = 2 times Kinetic Energy divided by Velocity squared 3)ve= \(2E,/m) 3) Velocity = Square-root of (2 times Kinetic Energy divided by Mass) The unit for Kinetic Energy is the Joule J Mass Gram or Kilogram gor kg Velocity Metres per Second Squared m/s or ms*  W 1)P=W/t 1) Power = Work Done divided by Time 2) W =Pt 2) Work Done = Power times Time t 3)t=W/P 3) Time = Work Done divided by Power The unit for Power __is the Watt Ww Work Done Joule J Time Second s Useful Output Energy Transfer Ef fici _ fficiency Total Input Enegy Transfer Useful Output Energy Transfer = Efficiency x Total Input Energy Transfer Useful Output Energy Transfer Total Input Energy Transfer = Ef ficiency The Units of Efficiency is the No Unit, this is just a number, usually a percentage Useful Output Energy Joule Total Input Energy Joule % Ef fici _ fficiency Total Power Input Useful Power Output Useful Power Output = Efficiency x Total Power Input Total Power Input = The Units of Efficiency is the Useful Power Output Total Power Input Useful Power Output Ef ficiency No Unit, this is just a number, usually a percentage Watt Watt % V 1) V=IR 2)1=V/R R 3) R=V/I 1) Voltage = Current times Resistance 2) Current = Voltage divided by Resistance 3) Resistance = Voltage divided by Current The unit for Voltage or Potential Difference _is the Volt Vv Current Amps (Amperes) A Resistance Ohm 0 P 1) P=IV 2)1=P/V V 3) V=P/I The unit for Power is the Voltage or Potential Difference Current 1) Power = Current times Voltage 2) Current = Power divided by Voltage 3) Voltage = Power divided by Current Watt W Volt Vv Amps (Amperes) A 1)P=PR 1) Power = Current Squared times Resistance 2)R=P/I? 2) Resistance = Power divided by Current Squared 3)1=P/R 3) Current = Square-root of (Power divided by Resistance) The unit for Power __is the Watt W Resistance Ohm Current Amp (Ampere) A p The unit for 1)p=m/V 1) Density = Mass divided by Volume 2)m=pV 2) Mass = Density times Volume V 3) V=m/p 3) Volume = Mass divided by Density Density is the Kilogram per Metre Cubed kg/ m2or kgm3 Mass Kilogram kg Volume Metres Cubed m3 Higher Level Equations The unit for 1) p=hpg 1) Pressure = Height times Density times Gravity 2) h=p/pg 2) Height = Pressure divided by Density times Gravity 3) p =p/hg 3) Density = Pressure divided by Height times Gravity 4) g=p/hp 4) Gravity = Pressure divided by Height times Gravity Pressure is the Pascal Pa Height Metres m Density Kilogram per Metre Cubed kg/m? or kgm= Gravity Metres per Second Squared m/s? or ms 1)E,= */,ke? 1) Elastic Potential Energy = Half Spring Constant times Extension squared 2)k= 2E, /e? 2) Spring Constant = 2 times Elastic Potential Energy divided by Extension squared 3)e= \(2E, /k) 3) Extension = Square-root of (2 times Elastic Potential Energy divided by Spring Constant) The unit for Elastic Potential Energy _ isthe _ Joule J Spring Constant kilograms per second squared kg/s2 or kgs Extension Metres m ∆ ∆θ ∆ ∆θ ∆ ∆θ ∆θ ∆ ∆ ∆ θ 1 Frequency le Period = Period or Time Period, unit is the Second, s Frequency, unit Hertz, HZ E 1) E=mL 1) Thermal Energy = Mass times Specific Latent Heat 2) m=E/L 2) Mass = Thermal Energy divided by Specific Latent Heat mM [L 3) L=E/m 3) Specific Latent Heat = Thermal Energy divided by Mass The unit for Energy _ Unit is the Joule J Mass Kilogram kg Specific Latent Heat Joule per Kilogram J/kg or Jkg= Potential Dif ference Across Primary Coil Number of Turns on Primary Coil Potential Dif ference Across Secondary Coil ~ Number of Turns on Secondary Coil 3 |3 rik p n Vv = Pp V. n. S| Tihs oS Potential Dif ference Across Primary Coil x Current in Primary Coil = Potential Dif ference Across Secondary Coil x Current Across Secondary Coil