ME 352 - Machine Design I
Name of Student
____________________________
Fall Semester 2011
Lab Section Number
________________________
Homework No. 7 (30 points). Due at the beginning of lecture on Friday, October 21st.
Solve Problem 14.15, page 679. For this homework, solve the dynamic force analysis problem by
the method of inspection; that is, solve one equation for one unknown variable, or in the worst case
scenario solve two equations for two unknown variables.
Note the given assumptions: (i) the crank is balanced, that is, the center of mass of link 2 is
coincident with the ground pivot O
2
; (ii) there is no friction in the mechanism; (iii) the external force
F
B
is acting on the slider (link 4) at point B; and (iv) gravity is acting into the paper, that is, in the negative
Z-direction.
If you would like to check your answers for this homework assignment then you could write a
computer program in Matlab which will use matrix inversion to determine the unknown variables.

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