# Equation List Flashcards

Acceleration Equation

v-u / t = a

Change in Velocity (m/s) / Time (s) = Acceleration (m/s2)

Forces Equation

f=m x a

Force= Mass x Acceleration

Momentum Equation

Δp = f x t

Change in Momentum = Force x Time

Power Equation

W = P x t

Hooke’s Law

F= k x e

Weight and mass equation

W = m x g

Wave Equation

v = f x λ

Velocity (m/s) = Frequency (Hz) x Wavelength (m)

Speed Equation

s = d / t

Speed (m/s) = Distance (m) / Time (seconds)

Efficiency (Energy)

Efficiency = useful energy in / useful energy out

(x 100%)

No Units

Efficiency (Power)

Efficiency = useful power out / useful power in

x 100%

Time period

T = 1 / f

Time (seconds) = 1 / frequency (Hz)

Relates to waves topic

Moments

M (or ρ) = F x d

Moments (Nm) = Force (N) X (perpendicular) distance (m)

Pressure equation

P = F / A

Pressure (N/m2 or N/cm2) = Force (N) / Area (m2 or cm2)

Velocity Equation

V = s / t

Velocity (m/s) = displacement (m) / time taken (s)