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## Homework Statement

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?

## Homework Equations

All I used is the initial momentum = final momentum theorem and p=mv.

## The Attempt at a Solution

a

I drew the vector diagram: ----->

\30d |

\ |

p=mv \ |

=.006kgm/s \ |

\ |

\ |

a=.005196kgm/s

p=mv

v= 1.04m/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..