# Differences

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 phy131studiof16:lectures:chapter12 [2016/07/29 12:20]mdawber [14.P.025] phy131studiof16:lectures:chapter12 [2016/10/25 10:20] (current)mdawber [Conditions for stable equilibrium] Both sides previous revision Previous revision 2016/10/25 10:20 mdawber [Conditions for stable equilibrium] 2016/10/25 10:20 mdawber [Circus Trick] 2016/07/29 12:21 mdawber [14.P.042] 2016/07/29 12:20 mdawber [14.P.051] 2016/07/29 12:20 mdawber [14.P.030] 2016/07/29 12:20 mdawber [14.P.025] 2016/07/29 12:20 mdawber 2016/07/21 12:07 external edit Next revision Previous revision 2016/10/25 10:20 mdawber [Conditions for stable equilibrium] 2016/10/25 10:20 mdawber [Circus Trick] 2016/07/29 12:21 mdawber [14.P.042] 2016/07/29 12:20 mdawber [14.P.051] 2016/07/29 12:20 mdawber [14.P.030] 2016/07/29 12:20 mdawber [14.P.025] 2016/07/29 12:20 mdawber 2016/07/21 12:07 external edit Line 100: Line 100: $\frac{F_{hx}}{\cos\phi}=\frac{(mg+\frac{1}{2}m_{a}{g})\cos\theta}{\sin(\phi+\theta)}$ $\frac{F_{hx}}{\cos\phi}=\frac{(mg+\frac{1}{2}m_{a}{g})\cos\theta}{\sin(\phi+\theta)}$ - - ===== 14.P.030 ===== Line 186: Line 184: This [[http://​www.youtube.com/​watch?​v=K5QGoP6bXaY|circus trick]] looks pretty difficult. ​ This [[http://​www.youtube.com/​watch?​v=K5QGoP6bXaY|circus trick]] looks pretty difficult. ​ - - {{youtube>​K5QGoP6bXaY?​large}} Line 193: Line 189: But actually it isn't! But actually it isn't! - - {{youtube>​FKMTRsOSKQU?​large}} An object whose center of gravity is below it's point of support will be in stable equilibrium so [[http://​www.youtube.com/​watch?​v=FKMTRsOSKQU&​feature=player_embedded|riding a unicycle on a high wire]] is easy if there is weight suspended from it like the one at [[http://​www.cosi.org/​|COSI]]. An object whose center of gravity is below it's point of support will be in stable equilibrium so [[http://​www.youtube.com/​watch?​v=FKMTRsOSKQU&​feature=player_embedded|riding a unicycle on a high wire]] is easy if there is weight suspended from it like the one at [[http://​www.cosi.org/​|COSI]]. Line 271: Line 265: $B$ is the [[wp>​Bulk_modulus|bulk modulus]]. ​ $B$ is the [[wp>​Bulk_modulus|bulk modulus]]. ​ - ===== 14.P.042 ===== - - ===== 14.P.051 ===== ===== Strength of materials ===== ===== Strength of materials =====