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November 21, 2014

November 21, 2014

Posted by **Becky** on Wednesday, March 21, 2012 at 3:53pm.

- Physics -
**Elena**, Wednesday, March 21, 2012 at 5:11pmThe law of conservation of linear momentum for elastic collision

m1•v1 = m1•u1 + m2•v2.

The velocities after collision are

u1 =(m1-m2) •v1/(m1+m2)

u2 =2•m1•v1/(m1+m2)

Since m2=4m1,

u1 =(m -4m) •82/(m+4m) = - 49.2 m/s

u2 =2•m •82/(m +4m) = 32.8 m/s

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