Recent content by mrblanco

Thanks @Mark44 and @davenn

I had no idea this was a rule (Assuming PPM is perpetual motion) I can't really change the title now though, or can I? As for your answer, I completely get that and know the only way to get some "free" energy is while going downhill or braking. However, this guy is pretty hard headed and...

I have a friend that wants to put several alternators on a car. However, he wants to gather the power from the wheels rather than the engine in order to "capture lost energy" and "save" fuel by running the AC and other electrical components off these alternators. I've already explained that...

The Nusselt number for an entire flat plate in the turbulent region has two different equations: One for Turbulent and one for Combined Laminar and Turbulent. How do I know when to use one or the other?

Springs in series so 1/k +1/k2

If i move the block to the right that would also compress the k2 spring. Aren't the springs working against each other because of the lever? When one pulls in one direction, the other pulls in the opposite direction. I know I'm missing something here but I can't seem to figure it out

If I only considered the spring on the right, I get a complex answer...

I'm thinking that has to be part of the equation of motion for the block

Also, I know I have to use rF1+/-rF2=I(alpha) just not sure how

This is all the information I was given. The block is moving to the left but no values are given. The middle lever has a pin connection

Homework Statement Find the natural frequency Homework Equations On picture The Attempt at a Solution Just need help with the equation of motion.

Yes. I actually just had one of those "aha" moments for the composition while looking at this again, however, the lever rule concept still escapes me