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Hey i wanted to know if u guys n gals have started to prepare for the hsc. Like are you writing pre-prepared essays or are u a person who just enters an exam and writes on the spot? Who has actually started to get more serious, especially after their halfyearlys, and have you already...

Hey guys I need help with these:confused: ... or how i would approach it: Simple harmonic motion: The period of a particle in moving in SHM in 6 s and its amplitude is 8cm. Calculate its velocity and acceleration (correct to 1 decimal place) when the displacement is 5cm from the centre of...