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#4
Feb12-13, 10:55 AM
P: 79

How can Simple Harmonic Motion have angular frequency?


http://www.youtube.com/watch?feature...h_Lr588#t=167s

He says that the tangential component of the force of gravity is -mgsin(θ), but why is it negative? If the tangential component is in the same direction as the velocity, shouldn't it be positive?