Recent content by bobbajobb

What I'm trying to say is...have I just gone about it in a different way? Could someone use the g ~ 9.8m/sec^2 thing for my example in my first post and see if it gets the same outcome?

Guys I'm seriously confused now :( So is what I'm doing in my original post...correct? Or at least somewhat? I don't need to go into detail about drag or anything for GCSE do i...?

And as you might have seen. I don't actually use the potential energy at all, I'm just showing that I know how to, to gain extra marks.

Ahhh sorry. The way the test works is that I hold the '30cm' mark directly above their fingers, so its almost touching. So the person's fingers are on '18cm' on the ruler.

No worries, this will sound a bit patronising but start with some easier equations (Now that you know your answer.) Y'know, REALLY easy ones like the DST triangle and stuff.

Thanks. :)

Oh...I thought the R2 referred to something you put into the equation. Not R^2. I suppose I shouldn't really comment when i don't know the Law. :( Sorry.

Sorry, would you mind using words to write it out? This is only GCSE so I'm not too good with all the proper letters and stuff :(

Right. You need to get K on one side by itself, with nothing else on that side of the equals sign. F=K*Q1*Q2/r2 (I don't know the Law, I'm assuming Q2/R2 should be in brackets) Whatever you do to one side, you have to do to the other side as well, so its equal. Divide by Q1 on both...

Homework Statement Okay, I've been set a piece of coursework to compare the reaction times of catching a ruler, with, or without a certain variable. (I've chosen either eye.) I'm having trouble working out the exact amount of time it takes the person to catch the ruler. (Yeah, I have...