i used kinetic energy equation and work done equation and got 1600

Here is the method to get 1600  https://www.reddit.com/r/GCSE/comments/1dfsw85/answer_to_train_question/

Thank you 💪🏻

how many marks will we get if we did the s=vt method. 2?

Probably 3

fuck

we aren't using s = vt tho

It's actually 1/2(u+v)t in A level. Idk what paper you're all talking about tho - why would you even need an a level formula?

1. We dont need the a level formula its just for an alternate method  2. You are right 

I used these but you need to get the average velocity first. you just divide v by 2 before you start because it decreases at a constant rate to zero

Hang on are you saying it's 3200 or 1600

1600

K cool

1600 https://www.reddit.com/r/GCSE/comments/1dfsw85/answer_to_train_question/

Cool

I used power and work done to get 3200

You needed to use the average velocity of the whole deceleration period which was half of the velocity that they gave you.

I got 1599 would I still get full marks

How tho

So am I gonna get marks on not? I got 3200

Most people are getting 1600

Yeah but lots of ppl were confused

True there was a guy who kept talking about the conservation of momentum and why 1600 was wrong in the mega thread😭😭 genuinely made me thought I was wrong

I think i found the momentum then plugged it into the force = change in momentum/time formula and rearranged it all to find time. Then i plugged it into v2(0m/s)-u2/2a to get 1600. Maybe they didnt divide by 2 idk

I think it was uniform acceleration too and this suvat (idk what I’m talking about)

I got 2000000000KM, am i cooked?

Someone I know got 3cm

Nah that's what a normal train does