First of all, I want to give thanks to MKJB admins for providing coveralls and safety boots to most of the juniors including me. We have been waiting for it. For those who haven’t receive their coveralls and safety boots, just be patient. I’m sure it’ll be somewhen next week. And also thanks to  Redwing for  designing the coverall beautifully.

I heard the new building is open today. It better be true. Can’t wait to see it, step on it, study in it or maybe sleep in it. Some say this building is for marine engineering department only but some other courses claim that they are too. What a pozer. But what do they say, sharing is caring. I don’t know if this is true or not, I heard the new building has a library, a canteen and some say swimming pool? What the heck? But what I do believe is, it has elevator(s) and FULLY WIFI-ED!!! Meaning internet networks are available. How exciting! Nowadays, internet is very important. Like very important. It’s like  a source of life. To my life, it is. Why?
Because most of my assignments requires internet connection. How? Because this is college. Welcome to college life. Where spoon feeding is never exist. Which is good for us. We can’t rely at the teacher all the time. Because at work, the teachers won’t be there for us. We must know what we’re learning and why. How does it apply to our work?One of my subjects that I learnt this week is Mechanical Science. Remember my last post? Yeah, it’s still is. Turns out it is that confusing when you understand it. Just make sure you familiarize with the formula. Here I give you what I learnt this week:-

Torsion of a shaft

Shear Strain at outer fibre = P1 P2/ LSince P1 to P2 is the length of arc, let’s replace the formula of length of arc at P1 P2 = theta x radius (r)So, shear strain at outer fibre = theta x radius / LNext is Modulus of Rigidity (G)G = Shear Stress (T) / Shear Strain
G = T / theta x r / L
G = TL / theta x r
Move T as a subject to get Shear Strain
T = (G)(Theta)(r) / L

Stress on this ring = (G)(Theta)(r) / LTotal load = Stress x AreaTherefore,  Load on one strip = (G)(Theta)(r) x a / LMoment of the Resistance of Ring = (G)(Theta)(r)²(a) / LG, Theta and L are constant. r and a are not constant depends on the strip.Total Moment of Resistance = (G)(Theta) E (a)(r)² / L
E (a)(r)² is called Polar Second Moment. Let’s make this to J
Therefore, T = (G)(Theta) x J / L or                     T / J = (G)(Theta) / L

By combing the above equation with the Shear Stress equation, it gives the Fundamental Torsion Equation:-

            T / J = T / r = (G)(Theta) / L

The funny thing is, the whole red text above is not to be memorize. All you have to do familiarize is the Fundamental Torsion Equation. But why is it stated? Because to show how they are related to each other. How they can be apply to each other.It took me time to understand it. Very long time. I felt like dying when I’m lost but I didn’t. I made it. All I did was relaxing my mind, have fun before doing it, encounter less distraction. It took me many tries to finish the exercises. But I managed.

“Winning is not everything, but wanting to win is” – Vince Lombardi