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# Unit 4

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1. http://filestore.aqa.org.uk/subjects...W-QP-JAN10.PDF
2aii?
In the mark scheme they use 30 for t and 1.5 for V0 , Why dont they use 40 for t and 1.0 for v0?
2. (Original post by Ayaz789)
http://filestore.aqa.org.uk/subjects...W-QP-JAN10.PDF
2aii?
In the mark scheme they use 30 for t and 1.5 for V0 , Why dont they use 40 for t and 1.0 for v0?
My impression is that you can use any correct values.
3. (Original post by SeanFM)
My impression is that you can use any correct values.
But like if i use a small value as in 20 for t then im sure i wont get the correct answer ygm?
4. (Original post by Ayaz789)
But like if i use a small value as in 20 for t then im sure i wont get the correct answer ygm?
I guess if we start talking about errors and stuff (though, as t increases V decreases so.. ) I think you'd be pretty close anyway.
5. (Original post by SeanFM)
I guess if we start talking about errors and stuff (though, as t increases V decreases so.. ) I think you'd be pretty close anyway.
The mark scheme is so vague :/ But yeah i understand! Like they use t as 30 but thats just a completely random number lol
6. (Original post by Ayaz789)
The mark scheme is so vague :/ But yeah i understand! Like they use t as 30 but thats just a completely random number lol
True they can be confusing sometimes. Yeah.. pick anything that has a nice t value and a nice V value. Using 20 gives 21.8 which is pretty darn close and acceptable (from the 22+/-1).
7. (Original post by SeanFM)
True they can be confusing sometimes. Yeah.. pick anything that has a nice t value and a nice V value. Using 20 gives 21.8 which is pretty darn close and acceptable (from the 22+/-1).
Ahh nw haha

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