# Physics Equations

• Created on: 10-05-18 12:59
• Physics Equations
• Paper 2
• Moments and Levers
• Moment of a Force = Force x Distance normal to the direction of the force
• Work Done
• Work Done = Force x Distance
• W = fd
• Work Done = Power x Time Taken
• W = Pt
• Power and Electricity
• Charge = Current x Time
• Q = It
• Energy Transfered = Charge Moved x Voltage
• E = QV
• Potential Difference = Current x Resistance
• V = IR
• Power = Energy Transfered / Time
• P = E/t
• Electrical Power = Current x Potential Difference
• P = IV
• Electrical Power = Current^2 x Resistance
• P = I^2R
• Density
• Density = Mass / Volume
• p = m/v
• Force and Pressure
• Force Exerted on Spring = Spring Constant x Estension
• F = kx
• Pressure = Force normal to surface x Area of surface
• P = F/A
• Paper 1
• Motion
• Spee =  Distance / Time
• V=d/t
• Acceleration= (Final - Initial Velocity) / time
• a=(v-u)/t
• Forces and Energy
• Efficiency = useful energy used / Totalenergy supplied
• Weight = Mass x Gravity
• W = mg
• Momentum = Mass x Velocity
• p = mv
• Force = Mass x Acceleration
• F = ma
• Work Done = Force x Distance
• W = Fd
• Kinetic Energy = 0.5 x Mass x Velocity^2
• KE = 0.5mv^2
• Waves
• Wave Velocity = Frequency x Wavelength
• V = f?
• Wave Speed = Distance / Time
• V = d/t