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Re: impulse/momentum



msylvest@XNET.IT writes:

PS looking back over the thread, I see Justin Parke asks "Any suggestions
on a problem that requires a student to understand/apply impulse and
momentum considerations to "continuous" systems like ropes, water, etc?"

I like to introduce this kind of calculation with the "cement factory
problem": A skip drops sand onto a conveyor belt, at a steady rate. The
conveyor belt maintains a steady speed. They find the force needed to keep
it going. The further discussion of where the energy dissipation occurs,
and the role of friction in the process is also interesting.
Thank you! I must admit to feeling a bit forgotten by the parties in the
discussion.