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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