1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Ball and inclined plane

  1. Jun 6, 2017 #1
    • Member advised to use the homework template for posts in the homework sections of PF.
    A ball, which can be regarded as pointin all its effects, falls steady , subject only to the weight force, on an inclined plane of an angle α with respect to the horizontal from a height h computed from the impact point. The ball bounces elastically. Get the d height can reach the ball and the falling parabola characteristics after the impact


    After impact vertical speed:

    $$ v_{y} = \sqrt{2gh} \cos (2 \alpha) $$


    Why ## \cos (2 \alpha) ##? There is a mathematical explanation for this? Yes, I know about vectorial speed components, but why exactly this corner?
     
  2. jcsd
  3. Jun 6, 2017 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What's the relationship between the angle of incidence and the angle of reflection when something bounces elastically off of a surface?
     
  4. Jun 6, 2017 #3
    angle of incidence = the angle of reflection
     
  5. Jun 6, 2017 #4

    Doc Al

    User Avatar

    Staff: Mentor

    Right! So draw yourself a diagram of the initial and final (pre and post collision) velocity vectors, showing the angle between them. Then find the vertical component of that final velocity.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Ball and inclined plane
Loading...