24lecture2a08

24lecture2a08 - Physics 2A Lecture 24: Mar 5 Vivek Sharma...

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Physics 2A Lecture 24: Mar 5 Vivek Sharma UCSD Physics
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Same Mass But Differently Distributed 11 2 2 0 L=constant zz before after II ω τ = = G G Larger I Smaller I
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Vector nature of angular momentum L and Implications of conservation of L G G
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Conditions for Equilibrium: CM of rigid body has a=0 F 0 ⇒= G G can't have tendency to start rotating about any point 0 τ G
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Stability & Balance Body in static equilibrium, if left undisturbed, will undergo no translational or rotational acceleration Stable equilibr If object distu 1. : object ret rbed, 3 outcome urns to its orig s possib inal pos le: ium ition 2. : Object moves even further away from it Unstable E s original q uilibr pos ium ition 3. : Object stays in new position (like a sphere on a Neutral flat ta Equ. ble)
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Maintaining Stability or Balance A body whose will be stable if a vertical line projected down from CG falls CG is above base o within the base of f suppor sup t port CG is below its point of su Object whose will maintain stable equilib pport rium
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Tipping Over Is Due to Rotation Due to Torque Normal force (acting upward to balance ) can only be exerted within area of contact.
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24lecture2a08 - Physics 2A Lecture 24: Mar 5 Vivek Sharma...

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