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Sadiebunkins
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Homework Statement
A diesel engine weighs 8 times as much as a freight car. This diesel engine, moving on a horizontal track at 3 km/h, crashes into the freight car (which was moving at 2 km/h in the same direction). What is the velocity, in km/h, of the now linked together engine/car combination? You may assume no numerical values not given.
Homework Equations
V= mdvd + mfvf over M or md + mf
The sub d is for diesel engine
The sub f is for freight car
The Attempt at a Solution
I am not really sure is the m's cancel and all that is left with is the v's. If so the final velocity would be 5 km/h