M1 ON 13 MAY ,WHO HAS THE BEST PREPATION,Post your doubts here?

[Ahmedraza73]

Guyz help me with the M1,Specially with the General motion in a straight line and forces?

 

[Ahmedraza73]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_42.pdf
Can anyone solve the question 7 for me and also the graph?

 

[Iadmireblue]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_42.pdf
Can anyone solve the question 7 for me and also the graph?

For the first part
The question tells you that there is a force of 12 N acting on the block and becuase it's a frictional force,it acts towards the right.
So this is the only force acting on the object and you know that F=ma and since a is 0.15 the acceleration -0.8
From this you know that U=3 t=2 and a =-0.8
then you can calculate V which gives you a vaalue of 1.4
So now you know that the block loses 7.2 Joules of energy so find the Kinetic energy loss at Y subtract this from 0.072 and find the value of V when it leaves.
I think you shold be able to go on from here>
Hope you understand
Good luck

 

[Ahmedraza73]

For the first part
The question tells you that there is a force of 12 N acting on the block and becuase it's a frictional force,it acts towards the right.
So this is the only force acting on the object and you know that F=ma and since a is 0.15 the acceleration -0.8
From this you know that U=3 t=2 and a =-0.8
then you can calculate V which gives you a vaalue of 1.4
So now you know that the block loses 7.2 Joules of energy so find the Kinetic energy loss at Y subtract this from 0.072 and find the value of V when it leaves.
I think you shold be able to go on from here>
Hope you understand
Good luck

I have done this too
but what about the graph....
Please help

 

[Iadmireblue]

I have done this too
but what about the graph....
Please help

I have done this too
but what about the graph....
Please help

For part one my graph looked something like this with V on the y axis and T on the x axis

 

[Ahmedraza73]

For part one my graph looked something like this with V on the y axis and T on the x axis

Thanks

 

[Lostsoul]

I just hope questions carrying 9 marks like this do not come.

 

[qffdhruba]

For part one my graph looked something like this with V on the y axis and T on the x axis

I think ur graph is wrong, because after collision the motion is towards a direction opposite to the initial motion. therefore, the velocity becomes negative, i think the graph shud be this:

 

[anishniroula]

Can you please help me how to resolve forces by horizantally and vertically.

 

[Ahmedraza73]

I think ur graph is wrong, because after collision the motion is towards a direction opposite to the initial motion. therefore, the velocity becomes negative, i think the graph shud be this:

I THINK YOU R RIGHT DUDE?

 

[soul]

can someone pleas tell me what is the work energy equation
and how does it link p.e, k.e, work done against resistance and work done by driving force

 

[mania _ manal]

can sm1 help with q7 last part how to draw distance time graph http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_42.pdf urgent help needed

 

[Ahmedraza73]

can someone pleas tell me what is the work energy equation
and how does it link p.e, k.e, work done against resistance and work done by driving force

POTENTIAL ENERGY =mgh
Kinetic Energy=1/2 mv^2
Total Energy=Potential Energy+Kinetic Energy
Loss in Potential =Gain in Kinetic or viceversa
Work done by driving force=F S
Workdone by Resistance force=R S (R IS THE Resistance force can be calculated form F-R=ma)
other Equations can be made according to the situation given?

 

[Ahmedraza73]

can sm1 help with q7 last part how to draw distance time graph http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_42.pdf urgent help needed

the one which is given by above post by qffdhruba

 

[Ahmedraza73]

Can someone teach me the General motion in a straight line?
Please Anyone

 

[qffdhruba]

the one which is given by above post by qffdhruba

I think this is the displacement-time graph....

 

[rjcooo1]

I hate mechanics -__-

 

[Iadmireblue]

I think this is the displacement-time graph....

Why does it curve downwards after t=2 ?

 

[Ariel Robert]

Why does it curve downwards after t=2 ?

First the body was moving forward then at 2s it started to reverse coming at a rest at 3.25s

 

[Sheikh Nahiyan]

Someone please explain to me Question no. 2 from May-June 2012-Paper 42. I have a serious problem in my concept and need a thorough explanation. And also question 4 and 5! Please guys.

If possible upload a podcast here (like explain it in and record your voice and send here)!!!

Please guys. In total chaotic situation right now