Mega A Level Maths Thread MK II

Has anyone got a prediction paper they can post for C1?

Because the $u$ would be different.

What's a prediction paper?

ah yea that makes since

thanks man

What's a prediction paper?

no prob

do you have any m1 tips?

I often find i over complicate things

I see an 8 mark question and just think it cannot be as simple as i think..

how do I over come this? thanks, oliver

nerves have kicked in for M1

Need help with this:

A particle P is moving so that its velocity, $v ms^{-1}$, after $t$ seconds is given by $v=3t^3 - 4t$

Initially P is at rest and is a displacment of 3m from a fixed point O.

Find $v$ when $t=1$.. okay so $v=-1$.

ii) Find an expression for the displacment of P at any time $t$.
$d= \int (3t^2 - 4t)dt$
$d=t^3 - 2t^2 +3$


Now this is where I need help!

Find the distance travelled by the particle before it returns to its intial position. thanks

EDIT: 69th post ROFL

Initial position => displacement = 0. Find t at this point to start with.

So you set the expression for displacment equal to zero and solve?

How would you find the area of region R?


Posted from TSR Mobile

How would you find the area of region R?


Posted from TSR Mobile

You made a mistake in your integration by the way - you integrated $3t^2$ instead of $3t^3$

EDIT: In my last post - I mean set the displacement equal to 3 instead of 0, as this is where it began.

Calculate area under triangle...

Then remove area under curve (integrate)

Area of a triangle with third side directly below N, then subtract the area beneath the curve between M and directly below N.

so far I have got:

when v=0 t=4/3 amd t=0

when t=0 d=3

when t=4/3 d=49/27

what other times do we take? thanks man