What would the force against which work is done be? If the incoming water is vertical and the the car motion is horizontal, shouldn't there be a force with a horizontal component that does this?
If there is no such force, what would prevent the car from re-gaining it's original velocity once...
If a railroad car traveling down a straight, frictionless track encounters vertical rain that fills it with additional mass, will the velocity decrease in order for the momentum to be conserved? Will the opposite happen if the water is let out from a hole in the bottom?
I cannot see any...
@ HallsofIvy: Thanks for the clear explanation.
@ Mute: <embarrassed> I should have read more carfully. I got carried away by "superimpose", which is used commonly in my mother tongue, Italian.
Hi all,
first of all, I have to admit I have often used this richness of knowledge that permeates through the posts of this forum to find answers to questions that I have come across in my studies. Thanks for all! Now, I have a question to post, for the first time.
I am trying to teach...