So i messed up on the Train question and that vector question. I used triangles for the vector question and got 5√2/2 (i + j). I dont know how many marks id get for that out of 7? The actual answer was 5/2 (i+j)
If u don't take direction into account for the impulse question, you make the mistake of getting 0.2 and not 3, but I think u will only lose 1 mark for that.
I have no idea what question 7a) was asking but I drawn a graph with know calculate degree from the vector( ~26 , ~64 and ~90) with root 5 from (-i,2j), and I gusee the F2 is 4.3 something