6-82. A 5-lb force is applied to the handles of the vise grip. Determine the compressive force developed on the smooth bolt shank A at the jaws.

1-7. Determine the resultant internal loading on the cross section through point D of the pliers. There is a pin at A, and the jaws at B are smooth. 20 N 20 N -120 mm- 80 mm 30° 40 mm 15 mm B

Determine the reactions at the supports. Draw FBD first. a). CLEARLY SHOW ALL WORK. B F G TH 200 Ib Scale: I unit -5 ft 200 1Ь 200 Ib Reaction at A (x-direction) Reaction at A (y-direction) = _[lb] _[lb] Reaction at E (x-direction) = Reaction at E (y-direction) =, [Ib] fib] b) Determine the ZERO FORCE MEMBERS. Fully justify your answer. Zero force member #1 (if any) = Zero force member #2 (if any) = Zero force member #3 (if any) =. c) Determine the loads in members: AF, AB and BC. Fully justify your answer. Load in member AB =. Load in member AF = Load in member BC =. Ib Ib Ib

2. Calculate the internal forces in the bar GF and GD in a roof truss as shownbelow. For each bar, indicate if the internal force is tensile or compressive. Usethe section method (snittmetoden). Point A has simple support and D has rollersupport.

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