Physics - Unit 2 - 2025

Forces+motion, electricity, solids+liquids+gases, work+power

Formula for Speed

Speed = Distance / Time

Formula for Acceleration

Acceleration = (Final Speed - Initial Speed) / Time

Formula for Final Speed (v2)

Final Speed = Initial Speed + 2 x acceleration x distance

Formula for Density

Density = Mass / Volume

Formula for Pressure

Pressure = Force / Area

Boyle's Law

P1V1 = P2V2 (Pressure and volume of a gas at constant temperature are inversely related)

Formula for Force

Force = Mass * Acceleration

Formula for Gravitational Potential Energy (GPE)

GPE = Mass * Gravitational Field Strength * Height (GPE = mgh)

Formula for Kinetic Energy (KE)

KE = 0.5 * Mass * (Speed^2)

Formula for Power

Power = Work / Time

Formula for Weight

Weight = Mass * Gravitational Field Strength

Formula for Mass

Mass = Weight / Gravitational Field Strength

Formula for Efficiency

Efficiency = (Useful Output Energy / Total Input Energy) * 100%

Formula for Energy

Energy = Power * Time

Formula for Voltage

Voltage = Current * Resistance

Formula for Current

Current = Charge / Time

Formula for Charge

Charge = Current * Time

Formula for Resistance

Resistance = Voltage / Current