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March 31, 2015

March 31, 2015

Posted by **Dan** on Sunday, October 18, 2009 at 2:14pm.

What are the final velocities of each ball if the collision is perfectly elastic?

What are the final velocities of each ball if the collision is perfectly elastic?

- physics -
**bobpursley**, Sunday, October 18, 2009 at 3:06pmUse conservation of momentum

m1v1=m1*v1' + m2v2'

solve that for v1'

Then use conservation energy.

1/2 m1*v1^2=1/2 m2*v1'^2 + 1/2 m2*v2'^2

put the v1' expression in that, and turn the algebra cranks, put it in quadratic form, and solve the quadratic equation.

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