Edexcel - M3 - 18th May 2016

Original post by ombtom

That was the most :banghead:

M3 COM question ever.

Was genuinely contemplating whether to just sacrifice the marks and ensure all other answers were correct :biggrin:

Reply 322

Thoughts on 14R? Did it as a proper mock today printed and wrote on it and everthing. Thought it was good but my god was the questions tedious. Both circular motions were a pain.

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Reply 323

Those who have done all the IAL's which is hardest?

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Reply 324

Ayman!

15

Original post by physicsmaths

Thoughts on 14R? Did it as a proper mock today printed and wrote on it and everthing. Thought it was good but my god was the questions tedious. Both circular motions were a pain.

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It was probably one of my favourite M3 papers - I did it as a proper mock and got 74 (full was at 72 UMS iirc). It was tedious, yeah, but it had some really nice questions.

Original post by physicsmaths

Those who have done all the IAL's which is hardest?

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Jan 14 was probably the hardest but I liked it tbh. Jan 15 and Jan 16 have some good moments questions. June 15 was relatively easy while June 14 was alright.

Reply 325

Original post by Ayman!

It was probably one of my favourite M3 papers - I did it as a proper mock and got 74 (full was at 72 UMS iirc). It was tedious, yeah, but it had some really nice questions.

Jan 14 was probably the hardest but I liked it tbh. Jan 15 and Jan 16 have some good moments questions. June 15 was relatively easy while June 14 was alright.

Yeh I will do Jan 14 as a mock today then! Then do the other IALs over the next few days before he examination.
Cheers

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Reply 326

ememoville

8

Do you have Jan 16 Ial as I can't find it online

Reply 327

http://56leomessiphotoshop.blogspot.co.uk/p/edexcel-january-2016-exam-materials.html

Original post by ememoville

Do you have Jan 16 Ial as I can't find it online

Reply 328

Did Jan 14 IAL missed out a factor of 1/2 costing me a mark in Q4b and lost 3 marks in Q3 for missing another factor of 1/2 in a KE term. Other then that got everything else seemingly correct, although in Q5 b i did moments about the axis through O including Reaction, Mass of cylinder and P and Fr and got the same answer. I get all the marks right?

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Reply 329

Should you always resolve forces in the vertical and horizontal directions?

Reply 330

JustDynamite

3

Can someone explain to me Question 3b in M3 Solomon A?

Reply 331

Original post by TheFarmerLad

Should you always resolve forces in the vertical and horizontal directions?

Well yeh, always do it perpendicular to direction of movement in a conical shell circular motion types. You can resolve in any plane aslong as you have the correct planar acceleration of the body.

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Reply 332

Original post by physicsmaths

Well yeh, always do it perpendicular to direction of movement in a conical shell circular motion types. You can resolve in any plane aslong as you have the correct planar acceleration of the body.

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Ah okay, how do you prove the COM of a conical/semipherical/any solid really shell?

Reply 333

Original post by JustDynamite

Can someone explain to me Question 3b in M3 Solomon A?

Are you familiar with the equations of SHM?

Reply 334

JustDynamite

3

Original post by TheFarmerLad

Are you familiar with the equations of SHM?

Yep. I'm not sure why I'm getting this wrong tho

Reply 335