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
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
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
Homework Help
Introductory Physics Homework Help
Inclined planes stuck on someting
Reply to thread
Message
[QUOTE="NUBIG10, post: 4525079, member: 489971"] [h2]Homework Statement [/h2] 2) In the variant of Atwood’s machine shown below, a mass slides on an inclined surface 40θ above the horizontal with a coefficient of kinetic friction μk = 0.15. The masses M1 and M2 are 1 kg and 2 kg, respectively. Which way does the pulley rotate? If the lowest point of each mass is initially 2m above the ground (vertically), and the system has a very small but non‐zero initial speed, how long does it take the first mass to hit the ground? [h2]Homework Equations[/h2] F=MA [h2]The Attempt at a Solution[/h2] So here's how I went about the problem. I first got a force diagram going and found all the forces F-parallel = 15.01N F-Perpend=12.59N F-gravity=19.6N F-Tens=? This is for Mass 2 on the incline For mass 1 I got F-gravity 9.8 F-Tens=? So I have been trying to use the Ʃ all forces=ma for both equations, this gives me M2= ƩF=ma=Ftens-Ffrict+Fparallel ƩF=2kg*a=Ftens+(-.15*12.59N)+15.01N M1=ƩF=ma=Ftens-Fgrav ƩF=1kg*a=Ftens-1N Then I put the above M1 equation into M2 and solve for acceleration then plugging in a into either equation to get Ftens. I already know the answer a=-.183 I just want to beat on my craft so when the test rolls around I can set up quick variable templates then plug and chug. Areas of doubt are, -signs -what to do about friction in the sum I already know its going anticlockwise so Friction is negative correct? -Plugged it in many times and cannot get the known answer. Thanks for any help and I will keep this post updated if I come across the answer before I receive help [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Inclined planes stuck on someting
Back
Top