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is 46 really a record? what's the next highest? you know why this has the most respinse - it's because physics is a poorly taught subject, and people have half understandings and argue them. I'm not saying I actually know all about all these g forces - I don't - that's why i posted this...

when a rollercoaster is going up - g force >1, when it is going down, g force <1. That's what jacaranda says. but g forces are always directed upwards for rockets.

well obviously you don't do 4U maths, spice girl. i'm saying since "a" is derived from a "weight" force, it has to be either upwards or downwards in direction.

ske! you da man!! hehe (do you know who i am?) i got 11.55 and 133 is also right! (yay!) ok, this option is by far the hardest option because it took me over an hour to do this option. It doesn't fair, even with scaling, because when we spend more time on this option, there's less time...

Important argument anfya guy is right - that question was in the catholic trials. A g force is defined as apparent weight/normal true weight. And this is where the formula g force = (g + a)/9.8 BUT "a" is acceleration upwards or downwards, by definition!! (weight forces are only on the...

what is the answer to Q4? the rollercoaster and g force one. Only reply to me if you are certain. But feel free to give me your opinions too. thanks.

josie, i'm telling you that this test is the easiest test ever for ex 2. Did you do any past papers under timed conditions? I'll also tell you that the canditature is roughly the same as last year, even though we have more people. And 85-90 is a good mark!

josie, Read the syllabus properly! Ok, this is what it is: - no locus of ellipses or NON-RECTANGULAR hyperboles. But, you are required to know how to do locus of rectangular hyperboles. (unless the syllabus has changed that last year). People put stuff that is NOT is the syllabus all the...