(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A bigger, moving, vI]i[/I], collides with a smalled train that is not moving. Assume that after the collision the trains stick together. Assume the trains have different masses (mand m_{big}_{small}). Write doen the momentum conservation equation for the scenario. Solve for the final velocity of the two trains, v_{f}

2. Relevant equations

conservation of momentum

m_{1}v_{1f}+ m_{2}v_{2f}= m_{1}v_{1i}+ m_{2}v_{2i}

3. The attempt at a solution

So i decided that m_{1}= m_{big}and m_{2}=m_{small}

m_{big}v_{big f}+ m_{small}v_{small f}= m_{big}v_{big i}+ m_{small}v_{small i}

since v_{smalli}is at rest then = 0

m_{big}v_{big f}+ m_{small}v_{small f}= m_{big}v_{big i}

(m_{big}+m_{small})*v_{bigsmall f }= m_{big}v_{big i}

v_{bigsmall f}= m_{big}v_{big i}/(m_{big}+m_{small})

is this right??

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Totally inelastic collision

**Physics Forums | Science Articles, Homework Help, Discussion**