4.88 Rod AB is bent into the shape of an are of circle and is lodged between two pegs D and E. It supports a load P at end B. Neglect- ing friction and the weight of the rod, determine the distance e corresponding to equilibrium when a = 20 mm and R = 100 mm. D

As shown, a load of magnitude P is applied to a structure. Assuming that all members are weightless and that ABEF and BCD are rigid bodies, find and G needed to maintain the structure in equilibrium. D I E a A F Assume the following values: a = 3.30 m, b = 2.20 m, and P = 108 N. magnitudes of the reactions at D

Determine the vertical force P that must be applied at G to maintain the equilibrium of the linkage.

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Two bars AB and BC of negligible weight are attached to a single spring of constant k that is unstretched when the bars are horizontal. Determine the range of values of the magnitude P of two equal and opposite forces P and -P for which the equilibrium of the system is stable in the position shown.

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