MECHANICS : FEW BASIC RELATIONS

how to1

      

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

Leave a Reply

Required fields are marked *
Your email address will not be published.