posted by help please .
A proton that has a mass m and is moving at 250 m/s in the + direction undergoes a head-on elastic collision with a stationary oxygen nucleus of mass 16m. Find the velocities of the proton and the oxygen nucleus after the collision
Conservation of momentum, and energy applies.
where Vo is the velocity of the oxygen molecule, and Vp is the velocity of the proton.
1/2 250^2=1/2 32 Vo^2+1/2 Vp^2
put the experession for Vp above into that, and solve for Vo