15notes -  Translation + rotation  Use absolute and...

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Translation: body maintains same direction of motion all points on the body in translation have same velocity and acceleration rB=rA if rB/A is constant, same velocity and acceleration Rotation about fixed axis Particles move along curves and all the curves have a common center Same angular velocity and acceleration. What’s different is v and a Trace a circle around the axis no matter what
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Although the slippage force is equal and opposite on the two discs, the angular acceleration is not the same for A and B. This is because alpha depends on torque and inertia.
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General plane motion
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Unformatted text preview:  Translation + rotation  Use absolute and relative velocities Instantaneous Center  If v and angular velocity is known then draw normal line to v  If Va and Vb are not parallel and unknown • Draw normal lines to both velocities and find intersecting point  If V and w are known • Then draw normal lines to both velocities lining them up • Draw second line joining tips of both velocities and find intersecting point Relative acceleration in plane motion  Case 1: if alpha is give or determined easily example  If alpha can’t be determined easily...
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This note was uploaded on 09/25/2010 for the course ENGR 225 taught by Professor Chase during the Spring '10 term at Aarhus Universitet.

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15notes -  Translation + rotation  Use absolute and...

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