Let F = [F] lb. a) Determine the force FD acting at roller D. b) Determine...

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Let F = [F] lb. a) Determine the force FD acting at roller D. b) Determine the force FE acting at pin E. F 4 ft B E C D A 600 lb.ft 3 ft- -3 ft- 2 ft- Let F = [F] lb. a) Determine the force FD acting at roller D. b) Determine the force FE acting at pin E. F 4 ft B E C D A 600 lb.ft 3 ft- -3 ft- 2 ft-