Hey, with the 2000 q4 d) the question is 'a particle is moving in SHM about a fixed point O. Its amplitude is 3cm and its period is 4pi seconds.
find its speed at point O'.
i got v= +/- 3/2 cm/s
however the answer is only +3/2 cm/s??
i seem to always get this little bit wrong, how...