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2 Pages

### Rotational_equations[1]

Course: PHYS 180, Spring 2010
School: UNLV
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Word Count: 146

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(about Rotation a fixed axis*) is like one-dimensional motion *if the axis can change, things get more complicated Which variables in rotational motion correspond to which variables in one-dimensional motion? one-dimensional motion linear variable distance velocity symbol x vx =dx/dt unit s m m/s rotation about a fixed axis rotational variable angle angular velocity sym units bol radians radians/s radians/s2...

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(about Rotation a fixed axis*) is like one-dimensional motion *if the axis can change, things get more complicated Which variables in rotational motion correspond to which variables in one-dimensional motion? one-dimensional motion linear variable distance velocity symbol x vx =dx/dt unit s m m/s rotation about a fixed axis rotational variable angle angular velocity sym units bol radians radians/s radians/s2 acceleration ax =dvx /dt m/s2 angular ("isomorphic") acceleration Similiar equations Just substitute in the corresponding variables in the one-dimensional equation to find the rotational equation One-dimensional motion with constant acceleration vx = vx0 + ax t x = x0 + vx0 t + () ax t2 x = x0 + () (vx0 + vx) t (vx )2 = (vx0)2 + 2 ax (x-x0) Rotation about a fixed axis with constant angular acceleration = 0 + t = 0 + 0 t + () t2 = 0 + () (0 + ) t 2 = (0)2 + 2 (-0)
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