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
Momentum question asking ratio of final 2 velocities
Reply to thread
Message
[QUOTE="hamza2095, post: 5635607, member: 578969"] [h2]Homework Statement [/h2] A cart mass of M moving at 3V (right) collides with a stationary mass of M, Determine the ratio of the two final velocities if the collision is elastic [h2]Homework Equations[/h2] p=mv ek=(mv^2/2) [h2]The Attempt at a Solution[/h2] m1v1=m1v1'+m2v2' Since the masses are all equal and v1 is 3V the equation becomes 3 = v1' + v2' Since the collision is elastic the total energy afterwards equals the total energy afterwards Ek=(mv^2/2) so Ek1=Ek1'Ek2' and since every term is over 2,and the masses equal the equation simplifies to v1^2=v1'^2+v2^2 After rearranging the first equation you get v1' = v2'-3, and then plug that into the energy equation to get 9= 2v2'^2 -6v2-9 0=2v2'^2 -6v2 after applying the quadratic equation you get 3 or 0, and since the velocity has to change v2' is 3, subsequently v1' is 0 so the ratio is 3:0, or 0:3 3:0 doesn't make sense to me for some reason but I can't find any mistake in what I did, is this right? [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Momentum question asking ratio of final 2 velocities
Back
Top