# Physics

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } MKS System Meter, Kilogram, Seconds Kinematics The study of the motion of an object without regard to the causes of the motion. Average Velocity (v) equals Change in displacement divided by change in timex/t V = (Vi+Vf)/2 a = Average v/t Vf= Vi + at Average x = Vi(t) + (1/2)at2 Vf2 = Vi2 + 2ax a = (Vf - Vi)/t Y= X= ViSinViCos Gravitational acceleration g = (average v)/t Dynamics Study of forces Types of force Contact forceField force Law of inertia If there is no net force acting on an object it will remain at rest or in uniform motion.If an object is in constant speed in a straight line its net force is 0. Law of Acceleration If there is a net force acting on an object the object will accelerate. The acceleration is directly proportional to the net force & in the same direction.Acceleration is inversely related to the mass. Law of Interaction For each action there is an equal, and opposite, reaction.Forces always occur in pairs. Weight Fw=mgDownwards, toward center of the Earth Normal Force/Perpendicular Force Contact force with surfacePerpendicular with the surfaceFn = mgCos Frictional Force How hard the surfaces are pressed together.f = mNm = F/N W = F(d)F(x)(ma)(x) Potential Ability to do work. Stored energy because of an objects position or condition. Position gravitational potential energy Condition compressed spring Gravitational Potential Energy ScalerPE= mgh Elastic Potential Energy PE = (1/2)Kx2K = N/m Conservation of mechanical energy v2 = 2gh Power P = w/tP = (Fd)/tP = Fv Work W = FdCos Kinetic Energy KE = (1/2)mv2 Momentum p = mv Elastic Collision Sum of pi = Sum of pfSum of (1/2)mv2 initial = Sum of (1/2)mv2final Conservation of momentum Ft = average p Centripetal Acceleration ai = v2/r Centripetal Force F = (mv2)/r TF = (9/5)TC + 32 TK = TC + 273.15 Change in x = (1/2)(vi + vf) average t Mechanical Energy ME = KE + (sum of)PE Momentum p = mv Change in momentum delta p = F(delta t) wavg = average angular speedangular displacement/time interval Fc = (mvt2)/r ac = (vt2)/r Fg = G(m1m2/r2)G=6.673 x 10-11 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Authormfosse ID60683 Card SetPhysics Descriptionphysics final review Updated2011-01-19T08:32:36Z Show Answers