Edexcel - M3 - 18th May 2016

The max part is but not the min?

Hey guys I don't understand question 3b june 14 R: https://8a40d6c38bafca75cc407741c0f3e1889c8e66b2.googledrive.com/host/0B1ZiqBksUHNYWENTbktxdlk5dEU/June%202014%20(R)%20QP%20-%20M3%20Edexcel.pdf

The examiners report says that the inequality is: tension <= frictional force + weight force down plane. But surely if tension is less that the two forces, it will keep on sliding down the plane?

With vertical elastic strings, how do I determine the direction of the acceleration? If the particle is pulled down from its equilibrium position, is the acceleration then downwards? And vice versa, if it is pulled up from its equilibrium position is the acceleration upwards?

Does anyone else think the international papers are much harder than the normal ones?

Me right now running away from all my M3 problems.

I'm f***ed

You'll be fine

By fine I mean 100 UMS

Posted from TSR Mobile

Thanks bro I wish Some of these COM questions with the wacky moments/geometry are just killing me

Thanks bro I wish Some of these COM questions with the wacky moments/geometry are just killing me

I'm leaving any of that kind of question to the end if it comes up haha

Yeah the moments is potentially what could finish me, when the weight has two component moments about the axis...

Posted from TSR Mobile

Definitely, they're good for preparation though

Posted from TSR Mobile

Yeah the moments is potentially what could finish me, when the weight has two component moments about the axis...

Posted from TSR Mobile

Thanks bro I wish Some of these COM questions with the wacky moments/geometry are just killing me

What is happening in the second step in the attached solution? Question is 2b from Jan 2011. Where are they getting lambda/(7+lambda) from?

I posted a solution to this yesterday let me find the post

there u go