physics exam (5 Viewers)

[Shrikar]

I got 392 turns
or something like that

Yeah, thats what I got too, it didn't look right though.

 

[farahodish]

:jaw: DONT SAY THINGS LIKE THAT!!!!!!!!!!!!!! WHAT DO YOU MEAN IT DIDNT LOOK RIGHT?!?!

IT LOOKED DAMN RIGHT SEXY, THANK YOU VERY MUCH!
*places hands on heart*

 

[Shrikar]

E = ... Vm-1 (cant remember answer)

Any more calculation questions I cant remember?

isn't the units for E = NC-1?

 

[Shrikar]

:jaw: DONT SAY THINGS LIKE THAT!!!!!!!!!!!!!! WHAT DO YOU MEAN IT DIDNT LOOK RIGHT?!?!

IT LOOKED DAMN RIGHT SEXY, THANK YOU VERY MUCH!
*places hands on heart*

Lol, sorry mate, my bad, but yeah, i got the same answer as you.

 

[Forbidden.]

Us three should be all correct, hopefully.
I had 392 turns as well.

 

[Tsuska]

epic fail.

HEY!! U stole my line:

EPIC FAIL!!!

 

[farahodish]

Us three should be all correct, hopefully.
I had 392 turns as well.

SEE? Now THATS more like it!!
and LOL @ epic fail.

I LOVE THAT LINE! bless your soul

 

[Shrikar]

SEE? Now THATS more like it!!
and LOL @ epic fail.

I LOVE THAT LINE! bless your soul

Phew, at least most of the answers are consistent.

 

[Forbidden.]

isn't the units for E = NC-1?

It would be more preferable as you used E = F / q rather than E = V / d.

 

[Shrikar]

It would be more preferable as you used E = F / q rather than E = V / d.

True.

 

[ladystar]

Yeah 392 would have been the answer I got, but does ANYONE remember if the question mentioned diameter or radius or what??

 

[Forbidden.]

Yeah 392 would have been the answer I got, but does ANYONE remember if the question mentioned diameter or radius or what??

I used the 20cm value because it was the perpendicular distance anyway.

 

[Steth0scope]

its not 392 although i did that .. the distance from the point of application of the force to the centre of rotation is the radius which is 10cm..therefore divide 392 by 2 and thats ur answer (coz its 10 not 20 as d in Torque=fd).

Also the question with mass dilation didnt say 0.37 or 37% .. its said .37% which

0.37/100 which is like 0.0037 or some shit so u shulda subbed in mv = 1 and mo = 1.0037 if u used 1 as ur rest mass

That was a really fuckd exam but as long as every1 fuckd it its all goood =)

 

[Ozza]

Aye, I did that too, but should have used 10cm because that was the radius...

 

[Nosviper]

THe question said it was 20cm diameter. You needed to use 10cm radius for your torque value giving you 196 turns.

 

[dwatt]

its not 392 although i did that .. the distance from the point of application of the force to the centre of rotation is the radius which is 10cm..therefore divide 392 by 2 and thats ur answer (coz its 10 not 20 as d in Torque=fd).

Also the question with mass dilation didnt say 0.37 or 37% .. its said .37% which

0.37/100 which is like 0.0037 or some shit so u shulda subbed in mv = 1 and mo = 1.0037 if u used 1 as ur rest mass

That was a really fuckd exam but as long as every1 fuckd it its all goood =)

FUCK.

Ah that's crap. I used 1.37 (as in a 37% increase). Fuckin stupid.

Ah well. I got 196 turns as well - pivot point was in the centre of the circle. That's where the axle went through from memory (if there even was an axle).

Wow - people got huge values for that horizontal velocity thing. 19m/s? That's light twice as fast as an olympic sprinter!

I got 3 m/s, which is as fast as me sprinting. I hope that's right. I used a similar formula to Forbidden

 

[Nosviper]

wtf are you talking about the mass increase was 0.37 = 37%

 

[hkgirl]

its not 392 although i did that .. the distance from the point of application of the force to the centre of rotation is the radius which is 10cm..therefore divide 392 by 2 and thats ur answer (coz its 10 not 20 as d in Torque=fd).

Also the question with mass dilation didnt say 0.37 or 37% .. its said .37% which

0.37/100 which is like 0.0037 or some shit so u shulda subbed in mv = 1 and mo = 1.0037 if u used 1 as ur rest mass

That was a really fuckd exam but as long as every1 fuckd it its all goood =)

omg. i didn't see the . infront of the 37% i took it as 37%. omg i want to suicide now.

and omg to the torque=fd. i calculated to 20 omg. i forgot to count from pivot & i do engineering studies. omg SHAME!!!

 

[morjoel]

Hmm for that torque question i used the radius which was 0.1m

Which means T = f x d
T = mass(don't remember it) x 9.8 x 0.1


Except for some reason i didnt get 192 coils i got exactly 200.

 

[thehootman]

wtf are you talking about the mass increase was 0.37 = 37%

Yeah thats what i did. It would be riduculous if it was .37% as that would yeild a velocity very low. Also, you get full marks if it is evident that you read it wrong but had correct method.

OVerall i found the exam pretty easy