Velocities of balls after 2D collision

[UrbanXrisis]

If a ball at 5m/s struck two stationary balls and it is repelled back at -3m/s at an angle of 15 degrees, what would be the velocity of ball #2 if ball #1 traveled at 1m/s and 10 degrees from the normal?

 

[cookiemonster]

Need more information. Masses of the balls?

cookiemonster

 

[UrbanXrisis]

The masses of the balls are constant at 2kg

 

[arildno]

Use conservation of momentum for C.M

 

[UrbanXrisis]

but how do I take the angles into account?

 

[Doc Al]

components

but how do I take the angles into account?

Treat x and y components of momentum separately. (Call the original direction the x-axis.)