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11_05_Rotation_FBD

# 11_05_Rotation_FBD - 11/5 Rotation and FBD Today Free Body...

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11/5 Rotation and FBD / Today: Free Body Diagrams and Rotation / Presentation “Block and Pulley” / Upcoming presenters please see me / HW “Rotational Energy” Due Wed 11/7 Questions? / HW “Rolling Car” Due Thursday 11/8

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Pulley and Block v = 0 v = ? a = ? T S,B = ? N Axle,R = ? Axle We have a block with mass 3m hanging from a ring (pulley) of mass m and radius r, which rides on a frictionless axle. h What do we do? Energy, of course! R T g S 0 0 0 PE is for the block only. 0 R T g S ? ? ? Where is the energy? How is it split? How do the velocities of the block and ring compare? How do the velocities of the block and string compare? v B = v String = v R not slipping! How do the masses of the block and ring compare? 3m m How does the KE R of the ring compare to the KE T of the block? 0 1 / 4 : 3 / 4
Pulley and Block v = 0 v = ? a = ? T S,B = ? N A,R = ? Axle We have a block with mass 3m hanging from a ring (pulley) of mass m and radius r, which rides on a frictionless axle. h

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11_05_Rotation_FBD - 11/5 Rotation and FBD Today Free Body...

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