How'd everyone go? (2 Viewers)

[ben_carroll93]

What did you guys do for the force in the chain question?

 

[megabakedpotato]

What did you guys do for the force in the chain question?

maybe 1200ish? I can't remember tbh

 

[SnowTau]

I stuffed that one up hugely, had no idea what to do. I started off alright but yeah... missed a few major things.

 

[miniwaybzz]

I've never really got a bending moment diagram wrong until today. I had never seen one like that before.

same here...... i just couldnt find the bending moments at each point... confused me...

 

[ben_carroll93]

Yeh k. I just did moments about the axle. With the pedal force and the perpendicular distance to the chain. Had no idea really...

 

[elvishtears]

It was a fairly hard test, didn't get that one with the Multiplexing, and wasn't sure with probably another 12 marks. That calculation with the current in the curcuit was 20mA not 2.5mA. Macrostructure of laminated materials used on an aircraft?...get fucked. I got 24.5 KN for member X however I said it was in Tension which i'm fairly sure is wrong now. Also the production of the crank shaft? I said Die-casting(no idea) i'm regretting not putting forging now.,

 

[elvishtears]

oh do you guys remember that bending moment and shear force one. HOW BADLY WAS IT DRAWN? omfg couldn't really tell where the force was drawn and the sides sort of put off... ended up getting a maximum bending moment of like 1.89KNm... probably wrong

 

[rover100]

Quite decent test, possibly lost max 5 marks
Happy with 95/100

 

[rover100]

oh do you guys remember that bending moment and shear force one. HOW BADLY WAS IT DRAWN? omfg couldn't really tell where the force was drawn and the sides sort of put off... ended up getting a maximum bending moment of like 1.89KNm... probably wrong

1.89Knm is correct

 

[gunner94]

1.89Knm is correct

Really? How'd you do it? I got like 1.8

 

[jgalpin]

It said MACROSTRUCTURE so you just draw the laminate.... laminated glass for example

 

[rover100]

Really? How'd you do it? I got like 1.8

Drew free body diagram
Found distances from Reactions and Forces
Moments at 500, 1000, 1500, 2000 and at reactions and force applied

found max bending moment

 

[taeyang]

I did fucking laminated timber for early/lightweight planes... I have no idea to be honest, could that work? probably not.. but my macrostructure just consisted of the cellulose fibres.. that's it hahaha,

 

[SnowTau]

oh do you guys remember that bending moment and shear force one. HOW BADLY WAS IT DRAWN? omfg couldn't really tell where the force was drawn and the sides sort of put off... ended up getting a maximum bending moment of like 1.89KNm... probably wrong

I got 1.89KNm as well.

IT WAS DRAWN TERRIBLY THOUGH!

It was a fairly hard test, didn't get that one with the Multiplexing, and wasn't sure with probably another 12 marks. That calculation with the current in the curcuit was 20mA not 2.5mA. Macrostructure of laminated materials used on an aircraft?...get fucked. I got 24.5 KN for member X however I said it was in Tension which i'm fairly sure is wrong now. Also the production of the crank shaft? I said Die-casting(no idea) i'm regretting not putting forging now.,

Could you please explain how you got 20mA? I've never understood that stuff even though I did physics as well >.>

Also it was definitely compression, and my teacher says forging was the best method.. whiiiiich I didn't choose >.<

 

[jgalpin]

unfortunately thats incorrect you needed to find the vertical and horizontal components at A. Then you needed to get the angle and force via trig, it came out as like 20 something at 54 degrees

 

[taeyang]

Drew free body diagram
Found distances from Reactions and Forces
Moments at 500, 1000, 1500, 2000 and at reactions and force applied

found max bending moment

I had absolutely no idea where the force was acting, that was the most unclear question I have ever done.

 

[jgalpin]

yea i just did it and its 20mA for everyone debating between 2.5 and 20

 

[SnowTau]

I had absolutely no idea where the force was acting, that was the most unclear question I have ever done.

From how I read it, the force was acting 800mm in, while the two forks from the forklift were each 500mm in. My shear force diagram essentially started at 500 in, force at 800, then finished at 1500mm. Outside had no shear force. I then used that to get my bending moment diagram.

yea i just did it and its 20mA for everyone debating between 2.5 and 20

What value do you use for V? The amount the voltage drops?

 

[jgalpin]

Well you have an 18V battery and theres some electrical device that uses up 2V so your remaining voltage is 16, do u have skype mate???

 

[alen180sx]

What did everyone get for the velocity ratio question?