A 10,000 kg railroad car is rolling at 8.00 m/s when a 6000 kg load of...
A 10,000 kg railroad car is rolling at 8.00 m/s when a 6000 kg load of gravel is suddenly dropped in. What is the car's speed just after the gravel is loaded? Express your answer with the appropriate units.
Homework Answers
Apply conservation of momentum.
the momentum before P= mv and after P' =mTv' wher mT is the total mass of railroad plus gravel.
∴
mv = mTv'
v' = 10000(8)/16000
=5 m/s
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