N5 Physics

Exactly. I'm not sure, but perhaps by 'minimum force' they're referring to the force that could be used, in any situation, to cause the helicopter to lift. For example, providing a slightly unbalanced force to accelerate upwards then a balanced force (the minimum force) to continue lifting the heli at a constant velocity. Seems far-fetched, and if this actually is the case it's quite an absurd question, but that's really all the logical thought I can relate to it.

What did you guys put for the forces on the boat?

What did you put for that question?

^yep, exactly the same.

That helicopter question was annoying, I absolutely agree. There was a lot of scoring and re-writing on my answer paper for that part, I originally wrote one more than its weight because logic, but then changed it to the same as its weight. Hoping I get the marks!
Also that question where we had to draw the diagram of refraction in water...so simple but I somehow messed up both diagrams. Ending up scribbling corrections on one and then drawing an extra one just to be sure.

Also, sounds stupid: but what did you guys put for an application of UV radiation? I wrote used in security markers for testing legitimate bank notes- is that even right?

Hopefully will get a copy of section 2/some photos tomorrow from m physics teacher. I'll see.

I totally agree, chopinfan, I'm a really uncertain about how they'll mark it now. I'll ask my physics teacher if I can tomorrow.

Hmmmm
www.wikipedia.org/wiki/Thrust-to-weight_ratio
"For a takeoff from the surface of the earth using thrust and no aerodymanic lift, the thrust-to-weight ratio for the whole vehicle must be more than one."
If the SQA doesn't mark it like this then there's something wrong lol; it would defy physics to takeoff without an unbalanced force. Unless I'm missing something haha

All it requires is to state that for helicopter (or whatever the craft was) to lift is that there is a net unbalanced force vertically (same as saying there is a net resultant upwards) from N2, vertical acceleration will be upwards by a=Fun/M, this will happen if thrust exceeds the weight (Fun=T-W).
Haven't even seen the question?

Model of the question (correct wording):

The weight of the helicopter is 9600N. State the minimum upward force required to lift the helicopter.


The answer should be greater than 9600, from the way we're looking at it. The question implies a single value - a minimum - however, there is no one value that can be given to this. Do you add one above the weight? If so, wouldn't a 0.01 increase still be valid?

A similar question appeared in my prelim. I stated a value one above the weight of the object and lost the mark.

My point is, either the question is ambiguous, the SQA have got it wrong, or we are missing something. I suspect the latter.

Model of the question (correct wording):

The weight of the helicopter is 9600N. State the minimum upward force required to lift the helicopter.


The answer should be greater than 9600, from the way we're looking at it. The question implies a single value - a minimum - however, there is no one value that can be given to this. Do you add one above the weight? If so, wouldn't a 0.01 increase still be valid?

A similar question appeared in my prelim. I stated a value one above the weight of the object and lost the mark.

My point is, either the question is ambiguous, the SQA have got it wrong, or we are missing something. I suspect the latter.

Did you not have to add on the weight of the people as well haha? But yeah I completely agree, could be that the SQA will end up accepting both answers.

You done 9600.01 which is too accurate an answer as data only given to 2sf!
Just state that minimum force required F=W=9600N.

tried to upload this earlier from school, but ****ty connection and slow computers prevented me...section 2 acquired! Feel free to debate, discuss and post answers. Some of these questions were really poorly written, my physics teacher said, so there may well be more than one correct answer.http://i.imgur.com/rw8lc0i.jpghttp://i.imgur.com/g2sok2m.jpghttp://i.imgur.com/cmbgwlq.jpghttp://i.imgur.com/8wzd3jk.jpghttp://i.imgur.com/zokh3l0.jpghttp://i.imgur.com/qvfmtkk.jpghttp://i.imgur.com/cc4ewpr.jpghttp://i.imgur.com/3xfgcyz.jpghttp://i.imgur.com/9oi9sha.jpghttp://i.imgur.com/r8xwamy.jpghttp://i.imgur.com/edbnlik.jpghttp://i.imgur.com/pqjtllc.jpghttp://i.imgur.com/rslegci.jpghttp://i.imgur.com/8mbuebk.jpghttp://i.imgur.com/aq0dnth.jpghttp://i.imgur.com/38b5ybm.jpghttp://i.imgur.com/3ulzcie.jpghttp://i.imgur.com/gnawlo4.jpghttp://i.imgur.com/zii8hv5.jpghttp://i.imgur.com/27k9zwj.jpghttp://i.imgur.com/snmnlqe.jpghttp://i.imgur.com/68dplvi.jpghttp://i.imgur.com/gkqe107.jpgguestappearance from my hand in the last one... Feel free to ignore the early answers in pencil- they're my teachers.edit: It is not formatting properly for me again. I hope y'all can see it right.

thank you sooo much!

images all gone apparently better to upload them directly to TSR just use InsertImage icon!

UGH I am so sorry that all those images have gone, but TSR was being a pain when I tried to upload them. I saved all the photos...but left them on my school computer. Will have to wait I'm afraid..Edit: I refreshed the page and the links worked again for me? Could just've been a problem with the site? Please try refreshing if you can't see them, and I will re-upload asap. And yes, please click the links in my original post. They seem to work.