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# I have a problem in Edexcel AS Physics Unit 1 paper! watch

1. Can anyone help me in solving the 19th question (b) ii) part in Edexcel AS May 2015 Unit 1 Physics paper?
(The link of the paper is attached below)

http://files.physicsandmathstutor.co...%20A-level.pdf

(PS: In marking scheme the answers were: 0.71 t, t/1.4, (root2/2)t, t/root2, root(1/2)
2. I dont see any screenshots
3. (Original post by lyamlim97)
I dont see any screenshots
Sorry there is a problem in attaching the screenshots. Can u check the 19th question in the link below?

http://files.physicsandmathstutor.co...%20A-level.pdf
4. Could you show what you have tried and i will try to guide you towards the answer ?
5. (Original post by lyamlim97)
Could you show what you have tried and i will try to guide you towards the answer ?
I tried using the 4 equations of motion!
This is the way I did using one of the equations.

s=ut+1/2at^2

since d=s/2 & a=5.63ms^-2 [the answer i got from (a)ii)]

s/2=(0*t+1/2*5.63*t^2)/2

I am supposed to show in terms of t and this was my answer which is wrong! ( I have already showed the Marking scheme answers, u can compare)
6. (Original post by hkn)
I tried using the 4 equations of motion!
This is the way I did using one of the equations.

s=ut+1/2at^2

since d=s/2 & a=5.63ms^-2 [the answer i got from (a)ii)]

s/2=(0*t+1/2*5.63*t^2)/2

I am supposed to show in terms of t and this was my answer which is wrong! ( I have already showed the Marking scheme answers, u can compare)
So u have to get rid of s right ? What other equations or values can u use ?
7. (Original post by lyamlim97)
So u have to get rid of s right ? What other equations or values can u use ?
I have to get rid of 2nd power!

S=(v+u)/2*t

v=u+at

v^2=u^2+2as
8. (Original post by hkn)
I have to get rid of 2nd power!

S=(v+u)/2*t

v=u+at

v^2=u^2+2as
U can use the same equation again. Mayb just different values ? What else do you know. What is t ?
9. (Original post by lyamlim97)
U can use the same equation again. Mayb just different values ? What else do you know. What is t ?
t=time
Plz check the link I sent !
10. (Original post by hkn)
t=time
Plz check the link I sent !
t is the total time for s. U can create another equation using that and then sub it into t(s/2)
11. (Original post by lyamlim97)
t is the total time for s. U can create another equation using that and then sub it into t(s/2)
Thank u I will work on that

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