A 5.00 X 10^-3 kg steel ball moving 1.20m/s collides elastically (no loss of kinetic energy) with an identical, stationary steel ball. The incident ball is deflected 30 degrees from its original path.
(a) Draw a vector diagram showing the paths of both balls after the perfectly elastic collision.
(b) What is the velocity of the incident ball after the collision?
All I used is the initial momentum = final momentum theorem and p=mv.
The Attempt at a Solution
I drew the vector diagram: ----->
p=mv \ |
=.006kgm/s \ |
Is this the correct way to do it? I think i mixed some things up as the velocity I found was for the horizonal vector, which should be the struck ball.. It feels like I made a real obvious mistake.. but its just out of reach..