Recent content by JLT

Haha - just checking if there was any industry standard (or if I'm justified on grading/teaching projects based purely on my own personal opinion on what "good" is) - I thought teaching STEM over lib arts would be less subjective ;) - still happy I'm not teaching gov or hist classes haha.

Yes the wheels are rotating and lever arm might still be moving - but the main goal is just the car going forward - what is "useful" is the car going forward however that happens. I guess for semi-trucks/trains - what is really "useful" is the load they carry traveling - not even the mass of...

For simple comparison, I think the same thought process can be followed as a block slides down a hill, - for block down hill, simple starting PE of mgh to final max KE 0.5mv^2 - comparing PE1 to max KE2 would result in finding the work friction did through the process. efficiency is just...

I thought it might be good to post resources on job outlooks, career quizzes, and just resources for those in school or just starting school: Job Outlooks: https://www.bls.gov/ooh/ Examples: https://www.bls.gov/ooh/architecture-and-engineering/home.htm...

Standard undergrad mechanics: https://engineeringstatics.org/Chapter_01.html https://mechanicsmap.psu.edu/ ↑ if anyone knows of other statics/dynamics free textbooks, let me know.

You might want to study: https://en.wikipedia.org/wiki/Catenary The trick for cables hanging under their own weight, the horizontal force is the same through the entire cable. The lowest point in cable has only horizontal forces. The angle of the cable is the amount of weight (vertical...

A fun simulation to try out is the PHET collision lab - you can define coefficient of restitution, give initial velocities, and set up collisions - choose the 2D model: https://phet.colorado.edu/sims/html/collision-lab/latest/collision-lab_all.html For your equations, energy is a scalar...

edit - either works: T1 - m1 g = m1 a1, T2 - m2 g = m2 a2, T2 - m3 g = m3 a3, T1 - (m2 + m3) g = m2 a2 + m3 a3, a2 + a3 = - 2 a1 or use T1 - m1 g = m1 a1, T2 - m2 g = m2 a2, T2 - m3 g = m3 a3, T1 = 2 T2, a2 + a3 = -2 a1 5 equations 5 unknowns: T1, T2, a1, a2, a3 test answer by plugging in...

Sorry, on my phone without equation editor. Instead of E=m c^2, could be E=mv^2 where v is any constant velocity of any fluid. See original post, a chain rule, its a mass flow rate equation.

non-Euclidean mathematics was explored prior to applying the ideas to quantum mechanics. If math is the language of the universe, something interesting should fall out of all of it. time position mass The above 3 are the building blocks if it all, and it just seems like all combinations of...

Is there any relationship between: E = m v^2 and E = Pressure*Volume? PV = (density *Volume) * velocity^2 Pressure=density*velocity^2 almost starts looking like Bernoilli's equation.

Why are some physical quantities multiplied or divided by other quantities interesting, and other combinations not explored?

No aether, what was it- splitting light and bouncing back no matter how the thing is rotated with respect to the rotating earth that is flying around the sun. I'm on vacation, just looking for book suggestions.

So the pattern goes: x(t) v(t) a(t) jerk(t) You can keep taking slopes of lines, and slopes of slopes - my questions is, what happens in the other direction- areas under curves and more areas under curves. What is the area under the x(t) curve? x*t, what is position multiplied by time?

Darn, I'm on my phone, cannot see posted equations. Best? Occam's razor kind of best.