176306686001 HW2 sol. mdc

# 176306686001 HW2 sol. mdc - Dyn-Force-hw-01 If 2 is 12...

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Dyn-Force-hw-01 If ϖ 2 is 12 rad/s, α 2 is 60 rad/s 2 , I 2 is 0.04 slug-ft 2 , W 2 is 6 lbf, A 0 A is 12 in., and A 0 cg 2 is 6.6 in., determine a) the magnitude and direction of the inertia force at the cg, b) the value of the offset, ε 2 , needed for the inertia force to replace the inertia torque, and c) draw the inertia force at this location on the figure. A G2 = 1029.4 in/s 2 @ -58.6 o ; F O2 = 16 lb @ 121.4 o ; ε 2 = 0.15 ft @ -148.6 o A N cg 2 A T cg 2 A cg 2 F O2 ε 2

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Dyn-Force-hw-02 If ϖ 2 is -5 rad/s, α 2 is 200 rad/s 2 , W 2 is 44.5 N, and I 2 is 0.0212 kg-m 2 , determine the the inertia force F 02 and draw it in its proper position on link 2. Determine the external force, F A , needed to produce the given angular motion. A G2 = 20.56 m/s 2 @ 157.1 o ; F O2 = 93.26 N @ -22.9 o ; ε 2 = 0.0455 m @ 67.1 o ; F A = 69 N @ -175 o
A G4 = 152.682 m/s 2 ; F O4 = 91.6 N; α 4 = 1680 s -2 ccw; T O4 = 840 N-mm cw; ε 4 = 9.17 mm; T IN = 3.0 N-m cw; F 34 = 40 N = - F 43 = F 23 = F 12 = -F 32 A G4 F 34 F O4 Dyn-Force-hw-03 For the four-bar linkage shown, ϖ 2 is 60 rad/s CCW, m 4 is 0.6 kg, and I 4 is 500 kg-mm 2 . Determine a) the magnitude of A g4 , b) α 4 in magnitude and direction, c) F 04

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