MECHANICS : FEW BASIC RELATIONS

Kinematics
– linear uniform movement S = S0 + vΔt
– linear accelerated movement S = S0 + vΔt + a(Δt)2/2
– free falling v = (2gh)1/2
- rotation ώ = ώ0 + ξΔt
α = α0 + ώΔt + ξ(Δt)2/2
v = R ώ
Dynamics
- weight G = mg
- specific weight γ = G/V
- friction force Ff = μFn
- impulse p = mv
- mechanical labor L = Fl or = Flcosφ
- mechanical power P = L/t
- mechanical efficiency η = Pu / Pc = Lu / Lc
- potential energy Ep = mgh
Ep = kx2 / 2 for elastic systems
- kinetic energy Ec = mv2/2