document.write( "Question 1198186: A billiard ball with a mass of 1.5 kg is moving at 25 m/s and strikes a second ball with a mass of 2.3 kg that is motionless. Find the velocity of the second ball if the first ball stops when it strikes the
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Algebra.Com's Answer #831740 by ikleyn(52802) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "In this problem, we write the momentum conservation law in the form\r\n" );
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document.write( "     =     (1)\r\n" );
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document.write( "not because the collision is elastic.  We write it because the momentum conservation \r\n" );
document.write( "is the universal conservation law, which is held AT ANY COLLISION.\r\n" );
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document.write( "In this problem, the momentum conservation law is in this specific form (1), \r\n" );
document.write( "because the second ball was at rest before the collision,\r\n" );
document.write( "while the first ball was motionless after the collision by the condition.\r\n" );
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document.write( "From (1), we find \r\n" );
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document.write( "     = ,   =  = 16.304 m/s  (rounded).    ANSWER\r\n" );
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