An object goes through simple harmonic motion with its position described as.... 1. The problem statement, all variables and given/known data An object undergoes simple harmonic motion with its position described by x(t ) = 50sin (2piet/3) C) when is Velocity first equal to 80 D) whe nis the Velocity next equal to 80 2. Relevant equations 3. The attempt at a solution k iknow you have to find the derivative.. which i think is this. V(t)= 50cos(2.094t)(2.094) = 104.7cos(2.094t) then set it to 80: 80=104.7sin(2.094t) i dont know where to go from here :S and for D) i have no idea wher to start!