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Tuesday 2 April 2013

Q.No.3.11: - Explain the difference between elastic and inelastic collisions. Explain how would a bouncing ball behave in each case? Give plausible reasons for the fact that K.E is not conserved in most cases?

Q.No.3.11: - Explain the difference between elastic and inelastic collisions. Explain how would a bouncing ball behave in each case? Give plausible reasons for the fact that K.E is not conserved in most cases?
Ans: - Elastic Collision:-
                                Such a collision in which K.E and linear momentum remain same before and after collision is called elastic collision.
Inelastic Collision: -
                        Such a collision in which K.E and linear momentum does not remain same before and after collision is called inelastic collision.
         If the bounding ball collide with the floor in such a way that it rebounds to the initial height then its collision will be elastic because both K.E and linear momentum will remain same but if it does not rebound to the same height then this collision will be inelastic collision because much of the momentum will be change before and after collision.
               In most of the cases the K.E is not conserved because if we think for a moment then we arrive at a result that elastic collision is an ideal one. K.E does not conserved because of some frictional effects and much of the K.E is lost in the form of sound, heat and work done against the colliding object etc…

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