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Oh wait the final expression is given itself in the question, the gradient. I'll check my work

I think it is mixed of vdu/dx-udv/dx / v^2 and implicit after that by substituting y with the given equation but then I also got stuck the mark scheme not giving the final form of the expression

Anybody have the full list of it?

I got the first part of the question correct but then in the second one, I tried to Force by the 1.4nC = Force by the 1.6 nC but then I don't know whether it is in equilibrium then I tried using ratio and proportionality like doubling the force I got from the previous question. I really don't...

Are you sure? Because mark scheme said all three component should not be satisfied. =/

isn't it -4-2t? I brought the positive 2 to the t side

How did I get the same value for x when I am supposed to get them different. Please help

Any one can solve this for me?

Ohh thank you :D

ooooops sorry for the other picture I gave you was for Nov 2012, really sorry

Pythagoras theorem

Anybody can help me with this? I got all correct till the exact end I got wrong. Please help http://postimg.org/image/p18toco3f/ http://postimg.org/image/or1b509h7/

Btw do you know how to upload pictures rather than giving the url?

Hey, here's the solution http://t.co/ZDzl0Yh9cE http://t.co/T23uUZNZmC

Oh yes, I think that's what make us get low grade, I got B in maths did the same like you but in a month for one mechanics

How?

Thanks, you're definitely getting A* (y)

So this is instantaneous, it changes every position, just like circular motion?

Haha ok then my bad, so basically you stop at Q and see the arrow for the anticlockwise

But the arrows are continuous in circle, how can we only assume downwards, if it is then I am thinking of the left hand rule rather than right hand rule