I have a problem here. I got "answers", but I don't beleive they are correct and I have no idea where I went wrong.(adsbygoogle = window.adsbygoogle || []).push({});

The question is... "Determine the speed V_2 (V sub 2) of the larger mass after the collision and Theta 1 and Theta 2.

mass of smaller particle = m

mass of larger particle = 2m

Initial speed of m = 3V_0 (3 v knot)

Initial speed of 2m= 0

Final speed of m = 5^(.5)V_0

Final speed of 2m=V_2 ....??

Theta1= ?

Theta2= ?

This is obviously a conservation of momentum/Kinetic energy problem, with X and Y components of direction. Here is what I have.

3mV_0=5^(.5)V_0Cos(theta1)+(2m)2^(.5)V_0Cos(theta2 )--->Conservation of momentum in the x direction(COMX)

0=5^(.5)mV_0Sin(theta1)-2*2^(.5)mV_0Sin(theta2)--->Conservation of momentum in the y direction(COMY)

.5*m(3V_0)^2=(m(5^(.5*V_0)^2)*(.5)+m(V_2final)^2--->Conservation of Kenetic ENergy(COKE)

(COKE) goes down to (2^(.5))*(V_0)

(COMY) goes to 0=5^(.5)*Sin(theta1)-2*2^(.5)*Sin(theta2)

(COMX) goes to 3=5^(.5)Cos(theta1)+2*2^(.5)*Cos(theta2)

Any mistakes ? Any suggestions? Thanks for looking, and sorry I am not very well schooled in how to write equations on the computer. PS: theta1 will be angle of m (from the horizontal) and theta2 will be angle of 2m(from the horizontal)

M98Ranger

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# Homework Help: Particle Elastic Collision problem

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