Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Physics
Classical Physics
Mechanics
General method for approaching block/rotating pulley/rotating object equations
Reply to thread
Message
[QUOTE="Same-same, post: 3624970, member: 349635"] Not asking about a specific problem, but general methods. I'm having trouble with problems that usually involve tension, rotating objects, rotating pulleys, and one block free to fall due to gravity. I'm not asking for help with a specific problem, but with this approach in general. It seems like it should be simple, but for whatever reason I always freeze up whenever I try to solve one of these problems, so I'm trying to better understand rotation. My current line of reasoning is to use force diagrams and then Since [itex]\tau[/itex] = RF sin ([itex]\theta[/itex]) =I[itex]\alpha[/itex], F =((I[itex]\alpha[/itex])/(R sin([itex]\theta)[/itex])) Since the net force is generally provided by one or more objects allowed to fall ƩF[itex]_{y}[/itex] (generally equal to m[itex]_{falling object}[/itex]g- F[itex]_{tension}[/itex] )=m[itex]_{total}[/itex]a + ((I [itex]_{1}[/itex] [itex]\alpha[/itex])/ (R[itex]_{1}[/itex] sin ([itex]\theta)[/itex])) + ((I [itex]_{2}[/itex] [itex]\alpha[/itex]))/ (R[itex]_{2}[/itex] sin ([itex]\theta[/itex]) ))... and so on for any of the other I[itex]\alpha[/itex] and ma. I will then generally plug in a/R for [itex]\alpha[/itex] At this point, I'm generally not sure what to do. Possible ideas are to do a sum of torques equation, or to attempt to solve for Tension in the x direction. Another thing that confuses me is when to include translational velocity for a rotating object in my equations. Thanks in advance. [/QUOTE]
Insert quotes…
Post reply
Forums
Physics
Classical Physics
Mechanics
General method for approaching block/rotating pulley/rotating object equations
Back
Top