2012 Solutions -- Terry Lee (3 Viewers)

[Artemkin]

"x is the displacement"
"When is the displacement of the particle zero"
hence x=0

+1

I lost a mark on the bloody binomial question. Didn't account for n having to be an integer.
Reckon for 13c)ii) they'll accept an answer that's in km/hr rather than km/min?

 

[school4nerds]

approx 46/70

 

[manscux]

But i got terry lees answer i.e. 1.51 seconds but i used 5 .... could both methods work

actually kenkap.... i dont think that is right (i may be wrong).... x = 0 is a value on the number line

draw the number line and you will see that x=0 is in fact one of the extreme positions of the particle (max negative amplitude)

i think it is x=5

 

[wilsondw]

Do you guys reckon that they will give you 1 mark for the 2nd part of the probability question even though you got the first part wrong but u still managed to still use the correct binomial probablity form?

 

[ahdil33]

The equation gave you the displacement of x. The particle was at the origin. therefore, x= 0.

Fairly pleased.

 

[Kieran95]

Do you guys reckon that they will give you 1 mark for the 2nd part of the probability question even though you got the first part wrong but u still managed to still use the correct binomial probablity form?

You should get both marks i think, considering its correct from previous answer

 

[traiwit]

Do you guys reckon that they will give you 1 mark for the 2nd part of the probability question even though you got the first part wrong but u still managed to still use the correct binomial probablity form?

I hope so man, i also got 1st part wrong
Hopefully we will get carry error

 

[VJ30]

does anyone have an idea what 56/70 will align to???

 

[NickGero]

For the displacement question, I subbed x = 0 into the displacement formula and the acceleration (x) formula and then formed two simultaneous equations with a and x and because of an algebra error it enabled me to solve the question and get an answer, despite having taken a very wrong method. Anyone wanna venture if I got any marks. I think its ridiculous they didn't say to 1d.p or 2 d.p, because it gives the impression of a neat answer.

If I get no marks for that, its 65/70, would be very happy if that can turn into 66 with a mark for this. Or possibly if I get 2/3 for the 3d trig question for having found multiple equations.

 

[YoYoWayne]

This is what im thinking , can anyone explain please ?

#18
I took a look during the exam too, but I think they state fairly clear

 

[nucgaek]

For the displacement question, I subbed x = 0 into the displacement formula and the acceleration (x) formula and then formed two simultaneous equations with a and x and because of an algebra error it enabled me to solve the question and get an answer, despite having taken a very wrong method. Anyone wanna venture if I got any marks. I think its ridiculous they didn't say to 1d.p or 2 d.p, because it gives the impression of a neat answer.

If I get no marks for that, its 65/70, would be very happy if that can turn into 66 with a mark for this. Or possibly if I get 2/3 for the 3d trig question for having found multiple equations.

Pretty sure you'll get 0... they can read for a BS answer and they'll give you 0 unless you were on the right track

 

[eileend]

oh... 55/70....

 

[7eleven]

Do you guys reckon that they will give you 1 mark for the 2nd part of the probability question even though you got the first part wrong but u still managed to still use the correct binomial probablity form?

Yeah u will
It called a "carry over". They cant penalise u twice for the same mistake.

 

[wilsondw]

ok sweet^ so does that mean I receive 1 or 2 marks for the 2nd part?