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Mechanics

Cool goIITian

Joined:	13 Aug 2011
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27 Jan 2012 22:08:17 IST

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collisions

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Ball 1 collides wid another identical ball 2 at rest.then for wat value of coeff. of restitution e,the velocity of 2nd ball becomes two times that of 1st after collision? pls explain.

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Viraat Gupta

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Joined: 21 Jun 2011

Posts: 688

13 Feb 2012 09:41:11 IST

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in this type of question keep in mind that when two identical balls concides , they move apaprt in normal directions with respect to each other .... use this and you'll get the answer !! if still any confusion .. reply here

boywholived

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Joined: 10 Feb 2012

Posts: 261

13 Feb 2012 16:01:06 IST

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the velocity of ball 1 after collision is

v1=(1-e)/2*u1

v2=(1+e)/c*u1

given v2=2v1

2-2e=1+e

e=1/3

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