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Introductory Physics Homework Help
Why they don't give me the same answer? dynamics of uniform circular motion
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[QUOTE="Andrax, post: 4943336, member: 438726"] [h2]Homework Statement [/h2] So a body $m$ is on a uniform circular motion ($\omega = d\theta/dt = \text{constant}$), it is suspended by an inextensible rope with negligeable mass [ATTACH=full]174723[/ATTACH] [h2]Homework Equations[/h2] P = mg , didnt know what to put here [h2]The Attempt at a Solution[/h2] So this is what the book did. What I did I drew the same diagram on another way so I an use polar coordinates (second picture) So the Weight is perpendicular to the vector $r$ and $\theta$, this is a problem since we won't have $mg$ in our equation at the end like the reasoning with the other picture but let's continue. On r: $$ - T \sin \alpha = -rw^2 $$ on $\theta$: $$ -T \cos \alpha = 0 $$ And this is wrong. I've been confused for 3 days in a row , what am I doing wrong? [1]: [url]http://i.stack.imgur.com/FntS7.png[/url] [/B] [/QUOTE]
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Introductory Physics Homework Help
Why they don't give me the same answer? dynamics of uniform circular motion
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