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Questions within the problem domain of mechanical engineering. Mechanical Engineering can be a broad field; consider choosing more specific tags if they apply.
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Kinematics Mechanics Find the length of the belt and the speed of the rack
For A. I know that the formula for belt is simply
$L=\frac{Pi(D_a+D_b)}{2}+2C+\frac{(D_b-D_a)^2}{4C}$
Which gives me $L= 116.99"$ since C is equal to $50$
For B. However I'm stuck and can't get t …