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Den Hartog’s Mechanics

A web-based solutions manual for statics and dynamics

Problem 24

For part a), we’ll just use the drawing of the left bellcrank as our free-body-diagram. Taking the moments about the pivot point, which we’ll call O, we get the equilibrium equation

\sum M_O = T_1 a - T_2 b = 0

and the relationship

T_1 a = T_2 b.

For part b), we’ll need to do some drawing. To get the same equilibrium relationship, we need to define a and b as the perpendicular distances from the pivot point to the lines of action of T_1 and T_2.

Problem 25Problem 23

Last modified: January 22, 2009 at 8:32 PM.