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posted by  Amerika on 11/4/2009 1:54:37 PM  |  status: Live  |  Earned Karma: 25

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Course Textbook Chapter Problem Needs by
Classical Physics College Physics (8th) by Serway, Faughn, Vuille N/A N/A 11/4/2009 at 12:00:00 PM
Question Details:

    Ball 1 traveling at 4.0 m/s to the right collides with Ball 2 that is traveling to the right at 1.0 m/s. After the collision Ball 1 is traveling to the left at 1.00 m/s. If the collision is elastic:

a)     Find the direction and velocity of ball 2 after the collision. (m/s)

b)     Are the masses of the two balls the same and why or why not?
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posted by Kevin_08 on 11/4/2009 8:25:11 PM  |  status: Live
Asker's Rating: Helpful   
Response Details:
  Given that
 u1 = 4.0 m/s
  u2 = 1.0 m/s
 v1 = -1.00 m/s
 

a)  We know that
     u1+ v1 = u2+ v2

   The speed of the ball 2 (after collision) is
                 v2 = u1+ v1 - u2
                      = (4.0 m/s)+ (-1.0 m/s) - (1.00 m/s)
                      = 2.0 m/s  right.

b)  Masses ate not equal because law of conservation of momentum not satisfied.
I hope this helps! Best of luck with the rest of your coursework.
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