# A level physics question

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#1
There is a question on the website savemyexams that gives the velocity time graphs of two cars. I have to find when one overtakes the other. On the mark scheme it says that I have to find out the same areas under graphs. Which area is it talking about?
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3 weeks ago
#2
(Original post by Ashikul)
There is a question on the website savemyexams that gives the velocity time graphs of two cars. I have to find when one overtakes the other. On the mark scheme it says that I have to find out the same areas under graphs. Which area is it talking about?
https://www.bbc.co.uk/bitesize/guide...6yc/revision/4 bottom of page

you'll need to see how the area under the graphs changes as time passes - when you find the value for time where both vehicles have travelled by the same displacement that's the moment one catches up with the other.
1
#3
(Original post by Joinedup)
https://www.bbc.co.uk/bitesize/guide...6yc/revision/4 bottom of page

you'll need to see how the area under the graphs changes as time passes - when you find the value for time where both vehicles have travelled by the same displacement that's the moment one catches up with the other.
No look the question is this:

question 3 c iii) 2

How is it possible to find the "same displacement" of both graph. The graph have very different areas.
Last edited by Ashikul; 3 weeks ago
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3 weeks ago
#4
(Original post by Ashikul)
No look the question is this:

question 3 c iii) 2

How is it possible to find the "same displacement" of both graph. The graph have very different areas.
Each car moves at some velocity

and you can rearrange for

and if you want to get the point where both cars 1,2 have equal displacement, i.e.

you just need to find the point where this is satisfied, i.e. where the area under the curves are equal.
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3 weeks ago
#5
(Original post by Ashikul)
No look the question is this:

question 3 c iii) 2

How is it possible to find the "same displacement" of both graph. The graph have very different areas.
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#6
(Original post by Callicious)
I do not have to use differentiation and integration in physics. But thankyou anyway
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3 weeks ago
#7
(Original post by Ashikul)
I do not have to use differentiation and integration in physics. But thankyou anyway
If you're calculating areas under graphs or getting a gradient, you are :P
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