Year 12s: what will be the first way you research your future options? >>

Unit 4

http://filestore.aqa.org.uk/subjects/AQA-PHYA4-2-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?

Reply 1

Kevin De Bruyne

Original post by Ayaz789

http://filestore.aqa.org.uk/subjects/AQA-PHYA4-2-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.

Reply 2

Lychee628

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?

Reply 3

Kevin De Bruyne

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.. :dontknow:

) I think you'd be pretty close anyway.

Reply 4

Lychee628

Original post by SeanFM

I guess if we start talking about errors and stuff (though, as t increases V decreases so.. :dontknow:

) 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

Reply 5

Kevin De Bruyne

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).

Reply 6

Lychee628

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).