Physics /12 Discussion!

[Obsidian Fl1ght]

Non uniform scale? :S

Oh that one.
My answr: 400 something.

 

[h4rriet]

Non uniform scale? :S

I chose A.

 

[talha196]

I did 480 #Tukka

16000 N d was the answer

 

[h4rriet]

Oh that one.
My answr: 400 something.

How'd you get 400?!?!???

 

[Obsidian Fl1ght]

16000 N d was the answer

How did u solve this question?
A step-by-step outline will be appreciated.

 

[h4rriet]

The answer for the force exerted when the wind hits the wall was 16000N.
CALCULATIONS: Force exerted by air was supposed to be calculated from newton's second law of momentum which is:
F = ϼAv^2
F = 1.2 x 12 x (33)^2
F = 15681N ≈ 16000N hence option D.

Might I ask why you've squared the speed?

 

[Obsidian Fl1ght]

How'd you get 400?!?!???

Err... I'm mistaken.
Which question are we referring to?
I'm talking abt the non-uniform graph of (temperature, resistance)...

 

[h4rriet]

Err... I'm mistaken.
Which question are we referring to?
I'm talking abt the non-uniform graph of (temperature, resistance)...

Yeah, that one. How'd you get 400 for it?

 

[Malik777]

check it Answer for Q3

 

[talha196]

How did u solve this question?
A step-by-step outline will be appreciated.

who said i solved the question i asked it from the guy beside me and luckily it got correct

 

[Obsidian Fl1ght]

Yeah, that one. How'd you get 400 for it?

I followed the line...
And deduced mostly. The scale was non-uniform bear in mind. And though I don't exactly know why I did that, all I can say is what I thought at that time made sense to me.

 

[Obsidian Fl1ght]

who said i solved the question i asked it from the guy beside me and luckily it got correct

Slick.

 

[h4rriet]

I followed the line...
And deduced mostly. The scale was non-uniform bear in mind. And though I don't exactly know why I did that, all I can say is what I thought at that time made sense to me.

I too followed the line, and got A for my answer (don't remember the number). Yes, the question said 'unusual scale'. Dunno what they were trying to imply but that.

 

[Obsidian Fl1ght]

I too followed the line, and got A for my answer (don't remember the number). Yes, the question said 'unusual scale'. Dunno what they were trying to imply but that.

Well - that's that.
We'll just have to wait and see.

Btw, how many questions have gotten wrong that you know of?

 

[h4rriet]

Well - that's that.
We'll just have to wait and see.

Btw, how many questions have gotten wrong that you know of?

I'm not sure of the questions which I might have gotten wrong. If the person above who posted 'confirmed answers' is correct, then I've got 2 wrong so far. Apart from that, I dunno.
Do you remember what you got for the moments question? I got 0.29 N, which was C.

 

[UziB]

Q 3 was B confirmed Bro when the two forces perpendicular to each othr are acting on a same point away from the point the resultant would be by parallelogram rule hence by calculations it would b 5 N

I don't remember which option it was but the key word in that question was resultant of the LINES OF ACTION of the two forces. Their lines of action met at the centre hence 1 thing was confirmed that resultant would also come out from the centre, and resultant always acts along the component with greater magnitude which in this case was 4N

 

[Malik777]

I don't remember which option it was but the key word in that question was resultant of the LINES OF ACTION of the two forces. Their lines of action met at the centre hence 1 thing was confirmed that resultant would also come out from the centre, and resultant always acts along the component with greater magnitude which in this case was 4N

They have also written magnitudes with it :/

 

[Obsidian Fl1ght]

I don't remember which option it was but the key word in that question was resultant of the LINES OF ACTION of the two forces. Their lines of action met at the centre hence 1 thing was confirmed that resultant would also come out from the centre, and resultant always acts along the component with greater magnitude which in this case was 4N

Though I loathe to say this (Another one down consequently), I think ur right.
45 degrees to the component will only be possible if and when the two components are of equal magnitude.
Yeah - isn't that superb? I've convinced myself already.
*sigh*

 

[UziB]

check it Answer for Q3

4N was the horizontal component, not the vertical one.

 

[Obsidian Fl1ght]

I'm not sure of the questions which I might have gotten wrong. If the person above who posted 'confirmed answers' is correct, then I've got 2 wrong so far. Apart from that, I dunno.
Do you remember what you got for the moments question? I got 0.29 N, which was C.

I seriously don't remmbr... but that answer sounds real familiar.