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### 9 Cards in this Set

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 Center of Mass Xcm = m1x1+m2x2+m3x3/m1+m2+m3 x=0 - reference point Center of Gravity point at which total gravitational force can be considered to act Xcg = w1x1+w2x2+w3x3/w1+w2+w3 Uniform Circular Motion Motion of the object that moves along a circular path with constant speed (NOT velocity) Velocity of UCM velocity is constantly changing (vector), always tangent to the circle Centripetal acceleration Ac= v^2/r, always points toward the center of the circle, perpendicular to velocity Centripetal force F = m* v^2/r vector sum of all the forces Torque Measure of forces effectivenes to accelerate object rotationally torque = rFsin theta torque = lF, l - lever arm Translational equilibrium state of the system if forces cancel Rotational Equilibrium state of the system if torques cancel