An overhead fold-up door with height H = 30 ft consists of two identical sections hinged at C. The roller at A moves along a horizontal guide, whereas the rollers at B and D, which are the midpoints of sections AC and CE, move along a vertical guide. The door’s operation is assisted by a counterweight P. Express your answers using the component system shown.
Figure P6.132
If at the instant shown, θ = 45°, and A is moving to the right with a speed υA = 2 ft/s while decelerating at a rate of 1.5 ft/s2, determine the acceleration of point E.
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