GCSE Combined Science Equations

Indigo Gray
Flashcards by Indigo Gray, updated more than 1 year ago


The equations to know for Combined Science at GCSE level.

Resource summary

Question Answer
Power (electricity) P = VI power (watts) = potential difference (volts) x current (amps)
Power (electricity 2) P = I^2xR power (watts) = current^2 (amps) x resistance (ohms)
Energy Transferred (power) E = Pt Energy transferred (joules) = power (watts) x time (seconds)
Density p = m/v Density (kg/m^3) = mass (kg) / volume (meters^3)
1 Energy Transferred (charge) E = QV Energy transferred (joules) = charge flow (coulombs) x potential difference (volts)
2 Energy Transferred (change) E = ItV Energy transferred (joules) = [current (amps) x time (seconds)] x potential difference (volts)
Weight W = mg Weight (newtons) = mass (kg) x gravitational field strength (newtons/kg)
Work Done W = fd Work done (joules) = force (newtons) x distance (metres)
Force Applied to Spring F = ke Force (newtons) = spring constant (newtons/metre) x extension (metre)
Distance Travelled S = vt Distance travelled (metres) = speed (metres/second) x time (second)
Pressure p = F/A Pressure (newtons/metres^2) = force [normal to surface] (newtons) / area (metres^2)
Moment of a Force M = Fd Moment (newton metres) = force [normal to direction of force] (newtons) x distance (metres)
Acceleration a = Δv/t Acceleration (metres/second^2) = change in velocity (metres/second) / time (seconds)
Resultant Force F = ma Resultant force (newtons) = mass (kg) x acceleration (metres/second^2)
Momentum p = mv Momentum (kg m/s) = mass (kg) x velocity (m/s)
Kinetic Energy KE = (1/2) m v^2 Kinetic energy (joules) = 1/2 x mass (kg) x velocity^2 (metres/second)
Gravitational Potential Energy GPE = mgh GPE (joules) = mass (kg) x gravitational field strength (newtons/kg) x height (metres)
Power (energy) P = E/t Power (watts) = energy transferred (joules) / time (seconds)
Power (work done) P = W/t Power (watts) = work done (joules) / time (seconds)
Efficiency (energy) Efficiency = useful output energy / total input energy
Efficiency (power) Efficiency = useful power input / total power output
Wave Speed V = fλ Wave speed (metres/second) = frequency (hertz) x wavelength (metres)
Charge Flow Q = It Charge flow (coulombs) = current (amps) x time (seconds)
Potential Difference V = IR Potential difference (volts) = current (amps) x resistance (ohms)
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