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Force due to gravity Ratio of the weight to the Gravitational mass of an object field strength, g. (Fg/m) The weight of an object is the force due to gravity acting on it (true or false?) True An object revolving around Earth or another planet satellite The gravitational field strength is the ratio of the mass to the weight of the object (True or False?) False Newton’s Law of Gravitation formula. Fg = GMm/r2 Angular frequency, ω = Units for α Rad s Angular momentum formula L = Iω Units for angular momentum Rotational equivalent of d = vit + ½ at2 Θ = ωit + ½ αt Force per unit extension Elastic (spring) constant Number of oscillations per second 2π/T Kg m s 2 -1 -2 2 Acceleration proportional to displacement & directed towards equilibrium position frequency The applied force on a material is proportional to the extension Hooke’s law Maximum displacement from the equilibrium position Simple Harmonic Motion Simple Harmonic Motion formula a = -ω y SHM displacement formula v = Aωcosωt Total mechanical energy of an object remains constant Conservation of energy In SHM max Ek occurs when object passes through equilibrium point Has a value equal to the amplitude of the SHM In SHM max Ep occurs when object is at the maximum amplitude position Occurs when a system is connected to an external driver Forced oscillations weight Phasor 2 Amplitude y = Asinωt SHM velocity formula