- #1

fatcats

- 34

- 1

**Hi there, so I'm not sure if this is allowed or not, but usually before I submit my work I try to check it on the internet to get full marks. I do the work as best as I can to try and get the best understanding of the subject possible. I think a) is correct but I think I messed up somewhere in b).**

1. Homework Statement

1. Homework Statement

a) A 0.800 kg target slides along the ice at 3.0 m/s W when it's hit by a 20g arrow moving at 260 m/s N. Find the final velocity of the target after the inelastic collision.

b) A 0.3 kg puck A moving at 5 m/s W undergoes a collision with a 0.4 kg puck B which is initially at rest. Puck A moves off at 4.2 m/s [W 30 N]. Find the final velocity of puck B.

## Homework Equations

Pto = Ptf

m1v1 + m2v2 = (m1 +m2) * vfx

basic trig sohcahtoa + pythagorean theorem

## The Attempt at a Solution

There is a lot of math so I have decided to just include screenshots of my work from word document, please see enclosed.

I checked b) on the internet and it seemed like the answers do not line up but maybe I did it correctly... I have diagrams made as well that I can upload if needed. To me, what does not make sense in B, is why I got a negative value for the y vector.

Please help, want to understand why/where I am wrong.