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The frame is made from uniform rod which has a mass \( \rho \) per unit length. \( A \) smooth recessed slot constrains the small rollers at \( A \) and \( B \) to travel horizontally. Force \( P \) is applied to the frame through a cable attached to an adjustable collar \( C \). Determine the magnitudes and directions of the normal forces which act on the rollers if \( (a) h=0.37 L,(b) h=0.50 L \), and \( (c) h=0.93 L \). The forces will be positive if up, negative if down. Evaluate your results for \( \rho=1.5 \mathrm{~kg} / \mathrm{m}, L=525 \mathrm{~mm} \), and \( P=74 \mathrm{~N} \). What is the acceleration of the frame in each case? Answers: