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Title: A freight car moves along a frictionless level railroad track at constant speed. Post by: ppk on Apr 4, 2012 A freight car moves along a frictionless level railroad track at constant speed. The freight car is open on top. A large load of coal is suddenly dumped into the car. What happens to the speed of the freight car?
A) It increases. B) It remains the same. C) It decreases. D) It becomes zero. E) Cannot be determined from the information given. Title: Re: A freight car moves along a frictionless level railroad track at constant speed. Post by: bio_man on Apr 7, 2012 C
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