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
Conservation of Energy problem
Reply to thread
Message
[QUOTE="Dr. Who, post: 5093850, member: 553212"] [B]Question:-[/B] A bead slides without friction around a loop-the-loop (Please click on the below link for diagram). The bead is released from a height [I]h[/I] = 3.50[I]R. [/I](a) What is its speed at point [I]A[/I]? (b) How large is the normal force on it if its mass is 5.00 g? [URL='https://www.dropbox.com/s/wsd8g5q9d87undj/Loop%20Quest.png?dl=0']https://www.dropbox.com/s/wsd8g5q9d87undj/Loop Quest.png?dl=0[/URL][h2]Homework Equations[/h2] [INDENT](a) Potential Energy( at height 'h')=Kinetic Energy( at A)+Potential Energy( at A) (b) Normal force + Weight of the bead = Centripetal force[/INDENT] [h2]The Attempt at a Solution[/h2] [INDENT][LEFT](a) [/LEFT] [INDENT][LEFT]mgh=(½ mv[SUP]2[/SUP]) + mgh[SUB]A[/SUB] gh= (½ v[SUP]2[/SUP]) + gh[SUB]A[/SUB] [/LEFT] v[SUP]2[/SUP]=2g( h- h[SUB]A[/SUB] )=2(9.8)(3.5R-2R)=29.4R v = √29.4R [B][/B][/INDENT] (b) [INDENT]N + mg = (mv[SUP]2[/SUP])/R N = m {(v[SUP]2[/SUP]/R)-(g)} N = 0.005 {(29.4R/R)-(9.8)} N = 0.098 [/INDENT] My Professor has suggested the above solution but I want to know how can you take the height at point A to be 2R? Similarly, I don't at all understand the equation for part(b) of the problem. Please explain your solutions with inline comments. Thanks in advance! [B]:)[PLAIN]https://www.dropbox.com/s/wsd8g5q9d87undj/Loop%20Quest.png?dl=0[/PLAIN][/B][/INDENT] [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Conservation of Energy problem
Back
Top