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## Homework Statement

Two objects collide on a horizontal frictionless surface. Object 1 comes from the left with mass .753kg and initial velocity of -.28m/s collides with object 2 moving from the right with an unknown mass and an initial velocity of .28m/s. They stick together when collided and moved to the right. The final velocity of object 1 is .2121m/s and velocity of object 2 is .292m/s. Find mass of object 2.

## Homework Equations

M

_{1}V

_{01}+M

_{1}V

_{02}=M

_{1}V

_{f1}+M

_{2}V

_{f2}

M

_{1}(V

_{f1}-V

_{01})/V

_{02}-V

_{f2}=M

_{2}

## The Attempt at a Solution

I have attempted this and got an answer of 30.879 as the mass but the correct answer was .648kg. I'm not sure which step I'm doing wrong because I have gone over several times and see if it was just algebra mistake but it wasn't and still got a really big number. Could someone give some pointers what I'm doing wrong?

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