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In this question of the 2017 HSC: I'm unsure how to find both points' polarity with the direction of movement not given, nor do I know how to derive the direction of movement from the rest of the question. Googling it isn't any help, as it only comes up with examples of a given movement. Any...

super happy with my timetable, good time between subjects, and even the 2nd week is still a day's rest. also the week and a half to cram physics is nice