- #1

- 42

- 0

## Homework Statement

A 35 kg ice skater traveling at 12 m/s runs head-on into a 65 kg skater traveling straight forward at 4 m/s. At what speed do the ice skaters travel if they move (stuck) together after the collision?

## Homework Equations

i put it below. i dont know if youre supposed to use something else. or if theres something eaiser.

## The Attempt at a Solution

answer from the teacher is 1.6 m/s.

i tried this:

m

_{1}*v

_{1}+m

_{2}*v

_{2}=m

_{1}'*v

_{1}'+m

_{2}'*v

_{2}'

m

_{1}*v

_{1}+m

_{2}*v

_{2}=v'(m

_{1}'+m

_{2}')

v=(m

_{1}*v

_{1}+m

_{2}*v

_{2})/(m

_{1}'+m

_{2}')

v=((35*12)+(65*4))/100

v=6.8

thats what i got. is it all wrong? i know the equation stuff isnt because thats from my teacher. but when i do the math its not the same. its supposed to be 1.6 m/s. am i missing a step?

thank you!

sweedeljoseph

Last edited: