# Edexcel AS/A2 Mathematics M2 - 17th June 2016 - Official ThreadWatch

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#41
(Original post by jamestg)
I don't like being a groan and/or being salty, but you could've credited me for the OP format
didnt know that was a thing m80 soz have edited it
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2 years ago
#42
Joined

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2 years ago
#43
Hey, in the question attached, how do you get the 3cos30 value for the centre of mass of that particular rod? Thanks.

EDIT: Nevermind, got it now.
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2 years ago
#44
This looks like a really easy moments question but for some reason I am unable to follow the markscheme for the first part.
I can understand the moments for the weight but then it comes for resolving to try and get the T perpendicular to the distance to A I can't seem to draw the angles right
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2 years ago
#45
(Original post by Windowswind123)
This looks like a really easy moments question but for some reason I am unable to follow the markscheme for the first part.
I can understand the moments for the weight but then it comes for resolving to try and get the T perpendicular to the distance to A I can't seem to draw the angles right
Have you noticed that triangle ACD is isosceles? AC = AD = 2.5a

Are you using T x perpendicular distance from A to the strut? It is easier in this case than splitting the T up I think.
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2 years ago
#46
I'm getting mid70s to low 80s at the moment, do you think I can get an A on Friday?

nervous

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2 years ago
#47
(Original post by tiny hobbit)
Have you noticed that triangle ACD is isosceles? AC = AD = 2.5a
.
Ah yeah so angle ADC = 30
Thanks
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2 years ago
#48
Does the constant of integration remain the same for acceleration->velocity->displacement ?

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2 years ago
#49
Can anyone help out with part ii? Not sure where the mark scheme is getting these numbers from (especially root(1300))
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2 years ago
#50
(Original post by Don Joiner)
Does the constant of integration remain the same for acceleration->velocity->displacement ?

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No -

For Displacement it is zero if it starts at the origin so make your check it says in the question, if not then there will be a constant.

For Velocity I have not done a question where it is zero, I'm assuming you can work out the constant but if you don't I can explain!

For Acceleration you wont get a constant as you will not be asked to integrate a function that goes to acceleration. For example the derivative of displacement is velocity and the derivative of velocity is acceleration and thus there is no derivative of acceleration.

Hope this helps!
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2 years ago
#51
Can someone help me out with this question

http://postimg.org/image/pb2x5eu6p
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2 years ago
#52
(Original post by fpmaniac)
Can someone help me out with this question

http://postimg.org/image/pb2x5eu6p
Assuming you know how to find the centre of mass of the triangle, you know that the centre of mass of the is directly below the poiny from which it hangs, s you can use that to find the angle

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2 years ago
#53
Im dont know how to work these out so would appreciate help:
http://postimg.org/image/j4rqcqfkh

http://postimg.org/image/dd092ibyv
12 b on there
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2 years ago
#54
Does anyone have the June 2015 question paper?
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2 years ago
#55
How on Earth did they get that answer? Surely it is e<5/3 ?
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2 years ago
#56
Can someone help me with this question please

http://www.thestudentroom.co.uk/show....php?t=3892047
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2 years ago
#57
(Original post by fpmaniac)
Can someone help me out with this question

http://postimg.org/image/pb2x5eu6p
Find centre of mass of the triangle, then that will be directly below O.

How on Earth did they get that answer? Surely it is e<5/3 ?
You're right, looks like it should be e<5/3, typo maybe?
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2 years ago
#58
(Original post by fpmaniac)
Im dont know how to work these out so would appreciate help:
http://postimg.org/image/j4rqcqfkh

http://postimg.org/image/dd092ibyv
12 b on there
I'm struggling with the first one, I'm going to look at it again.
I've got an answer for 12b though, how far have you got? Have you tried resolving the situation horizontally and vertically to get equations for the horizontal and vertical components of the force at the hinge?

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2 years ago
#59
(Original post by pineneedles)
I'm struggling with the first one, I'm going to look at it again.
I've got an answer for 12b though, how far have you got? Have you tried resolving the situation horizontally and vertically to get equations for the horizontal and vertical components of the force at the hinge?

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I dont know how to draw the force exerted on B by the wall so i havent gotten very far.
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2 years ago
#60
(Original post by fpmaniac)
Im dont know how to work these out so would appreciate help:
http://postimg.org/image/j4rqcqfkh

http://postimg.org/image/dd092ibyv
12 b on there
(Original post by pineneedles)
I'm struggling with the first one, I'm going to look at it again.I've got an answer for 12b though, how far have you got? Have you tried resolving the situation horizontally and vertically to get equations for the horizontal and vertical components of the force at the hinge?Posted from TSR Mobile

Here's my solution to 11

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