i have an AMAZING tip for you guys, i just hope you appreciate it!
for example, in a question where they ask you about what is the forumla of blah blah blah, something we didnt take, but you have to derive it from forumals we took and with information they give in a diagram for example, teachers might start doing all kinds of derivation! but!!!
there's a much much much much easier way, since all four choices are going to be equations obviously then CHECK FOR HOMOGENEITY, and then two at least have to cancel out......and then for example in one of the question it asked for the acceleration in a specefic time, and from the two left equations ( the homogenous ones) only ONE had time difference (t2-t1) and the other had only t2, and therefore it had to be the first.
it doesnt work ALL the times, because they may give you all homogenous equations, then you actually have to derive it, but its useful
and by the way this was said by an examiner that students do find out much easier methods of solving hard questions
and ANOTHER thing, in that momentum question that's always repeated, it has a very long derivation to get to the answer! but a quick tip, check the directions of the velocities and just re arrange the law of momentum equation and thats it
good luck all
