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I paid $ 1.67 for regular unleaded today in Spartanburg ! That is without any kind of discount.
 
roadstr6 said:
You teachers are always so damn picky! Sheesh!
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Behind almost every kick-a$$ engineer or scientist is a teacher that learned them in the art of kick-a$$.
 
I don't know... I would guess that tell your students to assume nothing on a regular basis but ask them a question that requires them to assume the other end of the rope is affixed, when your illustration does not clearly support that assumption.

Lol. I don't even have a foggy clue on how to actually solve it. Hopefully my son does.
 
If I understand the concept correctly our answers are all wrong by a minuscule amount based on wind resistance...and the length of the rope doesn't matter. Am I right on this, Rice?
 
roadstr6 said:
If I understand the concept correctly our answers are all wrong by a minuscule amount based on wind resistance...and the length of the rope doesn't matter. Am I right on this, Rice?
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Isn't that the coolest? A longer rope would mean a larger speed at the bottom of the swing, based on the rope being initially horizontal, but the larger radius also means less centripetal force is required so, yes, length of the rope drops out of the calculation. The 2200N force does only apply in the absence of friction.

(And for anyone still curious I'll post up a detailed solution tomorrow)
 
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I had two Automotive Technologies instructors in 1977 and 78 that really turned me on to what can be done with cars, trucks and scoots. Mr. Ermigotti, "Anything is possible if you understand the physics behind it". This from a guy that was supposed to be teaching the "mechanics of tomorrow". Mr. E taught me about suspensions and how torque effects the vehicle as a whole, he taught me how to approach building a vehicle with function first and that form would follow.

Another, engine shop instructor, Mr. Adams. He taught me that an engine is a living breathing thing that with proper care will likely out last the rest of the car. He taught me that to build a proper motor you must "feel" it. I found out that like most things in life, even with machines, there is more Zen to it than most would think.

Mr. Rice, you have my respect for effecting young minds.
 
tarzan-2.webp
 
I havent seen a paper like that in years. 17 yrs to be exact. Crazy that i used to resolve stuf like that. Know i just understand v and m/s2.
 
Damn john, and I just got you a year long gift subscription to Mother Jones too.
 
John, I know you're in the music industry. Correct me if I'm wrong, but don't you rent out sound equipment for gigs? I could be mistaken... Why do you have to deal with labor unions? I don't much care for them either - it's why I didn't mind coming to work for Boeing in SC. Had to deal with the union at Lockheed in Ft Worth... They really test your patience.
 
You have my sympathies John. I had to deal with local unions when I was building mall stores. My boss showed up one day all pissed off at the electrical contractor, union. The only thing these guys had down was the union break and lunch schedule. So my boss argues with them and then proceeds to roll their job box out the back door and pushes it down hill and it slammed into a car.
 
That is not to say all unions are bad and lazy. My father was a Teamster for 35 years and worked his butt off.
 
just don't put them near the fireplace
 
Am I the only one who was waiting for his shirt to get sucked into that open belt & pulley each time he leaned in?
 
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