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wesDOT
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Homework Statement
A 5.0-gram particle moving 60 m/s collides with a 2.0-gram particle initially at rest. After the collision each of the particles has a velocity that is directed 30° from the original direction of motion of the 5.0-gram particle. What is the speed of the 2.0-gram particle after the collision?
Homework Equations
conservation of kinetic energy equation
conservation of linear momentum equation and the x and y components
m1v1i=m1v1fcos(theta) + m2v2fcos(phi)
The Attempt at a Solution
m1=5
m2=2
m2=.4m1
theta=30
phi=30
Since the the only two variables I am missing are the two final velocities, I have tried solving one of the equations for mass2s final velocity and then subsituting that value into either the original equation or another one. Everytime i end with an answer that is not one of my choice. I am confused as to how i should go about find the final velocities.