Recent content by frs2fh

Thanks Ray, I did this before I posted and it seemed to work. I'm just afraid if I made a mistake in one direction I made it again in the other. Like I stated, I haven't done this (any integration / derivatives or solving DE) in over a decade. I just want to know if it's correct.

Hi, I have a first order equation I've solved to help a friend along in another poblem. But I have not solved a DE in over 10yrs - so I just want to make sure I did it correct. It an IVP. y' = (1+1/x)y y(1) = e. So I come up with y = CXe^x (C = 1 for IV)

I appreciate the responses and say this with a smile. You must all be physics teachers, because I ask a question and get three questions in return.:-p By the way, I'm not a student - I finished a masters degree in Computer Engineering 9 years ago, and I remember very little physics so I'm...

There is a friction between the boat and water though, same question if that friction wasn't there I would expect the boat to "glide" backwards. But I haven't read about boats, just cars and it's stated without friction, no acceleration. Hence the confusion.

Well, that is my question. I've read in my Vehicle dynamics book this, as well as on the internet in several places. So if it does accelerate then how? What I think is it would but the tires wouldn't spin. But this is of course not a "real" situation, so the books just state this...

If f = ma, then in a case of a vehicle accelerating/decelerating why does there need to be a friction force? Say you had no friction force (I know this is not possible) and a car sitting on level ground, then apply a force from a high powered fan (Drag) to the front of the car. why does this...