The two blocks used in a measuring device have negligible weight. The spring is compressed 4 in. when in the position shown. The end of the screw is smooth and the coefficient of static friction at all other points of contact is μ = 0.35. (Figure 1) gure k = 20 lb/in. B 45° A 60° < 1 of 1 > Determine the smallest axial force P which the adjustment screw must exert on B in order to start the movement of B downward. Express your answer to three significant figures and include the appropriate units. P= Submit μA Value Provide Feedback Request Answer Units ?

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The circular shaft AB consists of a 18 mm diameter solid steel cylinder in which a 8 mm diameter hole has been drilled from end B up to point C. The shaft is attached to fixed supports at each end, and a 150 Nm torque is applied at C. The torque reaction at A is 50 Nm. Determine the ratio of lengths L₁/L₂. Input your answer to two decimal places. 4₁ L₂ A 150 Nm B