- #1

prockotyler

- 1

- 0

## Homework Statement

A hockey player with a mass of 30.0-kg is initially moving 2.00-m/s to the right. He catches on the stick a puck initially moving at 35.0-m/s at an angle of 60 degrees. The puck's mass is .18 kg and the player and puck form a single object for a few seconds. (A) Determine the direction angle and speed of the puck AND skater after the collision. (B) Was this collision elastic or inelastic? Prove it with numbers.

http://imgur.com/q8IDYQb

SORRY FOR THE TERRIBLE DRAWING... kind of in a hurry.

2. Homework Equations

2. Homework Equations

P

_{before}= P

_{after}>>> MV + mv = (M+m)V

Conservation of kinetic energy and 1/2mv

^{2}

## The Attempt at a Solution

The answers are given:

(A): 1.89-m/s , 5.48 degrees

(B): inelastic because K < K

_{0}

I understand B, mostly. You just find the kinetic energies of the systems before and after and compare them. If they don't match up, it has lost some KE and you know it's inelastic. But, part A really messes me up. I tried just plugging in the numbers for my first relevant equation, then I realized I probably needed to find the components of each and then find the resultant ones. Any help would be amazing.

-TP