1. The problem statement, all variables and given/known data The rod OA rotates clockwise with a constant angular velocity of 6 rad/s. Two pin-connected slider blocks located at B move freely on OA and the curved rod whose shape is a limacon described by the equation r = 200*(2-cosθ) mm. Determine the magnitude of the acceleration of the slider blocks at the instant θ = 135°. 2. Relevant equations αr=r''-rθ'2 αθ=rθ''+2r'θ' α = √(αr2+αθ2) 3. The attempt at a solution I am trying to solve for the magnitude using the normal and tangential acceleration components. r = 200*(2-cosθ) --> r(135) = 541.42 mm θ' = 6 rad/s r' = 200 sinθ * θ' --> r'(135) = 848.53 mm/s θ'' = 0 r'' = 200cosθ * θ'2= -5091.17 mm/s2 When I plug all those values in I keep getting the wrong answer. Can someone tell me where I am going wrong?