Physics Formula's

uniform acceleration: s = ut + ½at²

v² = u² + 2as

speed:v = s / t

acceleration: a = (v - u) / t

Force: F = ma

Weight: W = mg

density: ρ = m / V

Moment of a force: T = Fx

Torque: T = Fx

Pressure: p = F / A

work done: W = Fd

kinetic energy: E_k = ½mv²

gravitional potential energy: ΔE_p = mgΔh

power: P = W / t

power: P = Fv

stress: σ = F / A a= cross sectional area

Strain: ε = Δl / l

Young Modulus: E = stress / strain = σ / ε

electric current: I = ΔQ / Δt

potential difference: V = W / Q

potential difference: V = P / I

electrical resistance: R = V / I

resistivity: ρ = RA / l

power: P = I²R

power: P = R² / I

electrical energy: W = VIt

resistors in series: R = R₁ + R₂ + ...

resistors in parallel: 1 / R = 1/ R₁ + 1 / R₂ + ...

force on a current carring conductor : F = BIl sin θ

photon energy: E = hf

photo-electric affect: hf = φ + E_{k max}

photo-electric affect: hf = φ + ½mv²_max

de Broglie equation: λ = h / p

de Broglie equation: λ = h / mv

refractive index: n = c_i / c_r

refractive index: n = sin i / sin r

refractive index: n = n_r / n_i

wave speed: v = fλ

double slit interference: λ = ax / D