Physics Equations

SUVAT equations with v as subject

v = u + at

v² = u² + 2as

SUVAT equations with s as subject

s = ut + ½ at²

s = vt - ½ at²

s = ½ (u+v)t

Average speed

distance (m) / time (s)

s = d / t

Average velocity

displacement (m) / time (s)

v = s / t

Period of a pendulum (s)

total time (s) / number of swings

T = t / swings

Acceleration

(final velocity - initial velicity) / time (s)

a = (v - u) / t

Weight (N)

Mass (kg) * gravitational field strength

Force (N)

Mass (kg) * acceleration

F = ma

Density (kgm^-3)

Mass (kg) / volume (m³)

ρ = M / V

Hooke’s law: Force(N)

Constant (Nm^-1) * extension (m)

F = kx

Pressure (Pa)

Force (N) / area

P = F / A

Fluid Pressure (Pa)

Density (kgm^-3) * gravitational field strength * height (m)

P = ρgh

Work (J)

Force (N) / Area (m²)

ΔE = Fd

Power (W)

Work done (J) / time (s)

P = ΔE / t

Kinetic Energy (J)

½ * mass (kg) * velocity² (ms^-1)

KE = ½ mv²

Gravitational potental energy (J)

Mass (kg) * gravitational fiend strength * height (m)

GPE = mgh

Efficiency

Useful (power / energy) out (W/J) / total (power / energy) in (W/J) * 100

Efficiency = (P/E) out / (P/E) in

Moment (Nm)

Force (N) * perpendicular distance from pivot (m)

M = Fd

Sum of clockwise movements in a system at equilibrium (Nm)

Sum of anticlockwise moments (Nm)

Momentum (