ENGN.2050HW3Moments
.pdf
School
University of Massachusetts, Lowell**We aren't endorsed by this school
Course
ENGN 2050
Subject
Mechanical Engineering
Date
Dec 16, 2024
Pages
2
Uploaded by ColonelMonkeyMaster1211
ENGN.2050 Statics HW3 Moments – 5 problems Include a heading on your work: Name, assignment name, course number & section •All work should be neat, sketches done with a ruler, intermediate answers indicated with an underline, final answers in a box and all pages numbered. •You MUST assign questions to pages in Gradescope for credit •Use Complex Problem-Solving techniques oFree-body diagrams (always) oAssumptions oPlan oEquations (in variable form) oSolve oTest (does it make sense – justify why you say this) oInterpret (how does this work into original objective) •Neatness counts – use a ruler for diagrams •Show your work for every step. •Annotate your solution process and describe the methodology. •Don’t forget units. •Put a square around your final answer. •Use 3 significant figures in your final answer (4 if the first digit is a 1). 1.Determine the moment about point B of each of the three forces acting on the beam. What is the total moment resultant about point B? 2.Two men exert forces of F = 80 lband P= 50 lb on the ropes. Determine the moment of each force about A, as well as the resultant moment. Which way will the pole rotate, clockwise or counterclockwise?
3.The force F = {400i - 100j - 700k} lb acts at the end of the beam. Determine the moment of this force about point A.4.The man pulls on the rope with a force of F = 20 N. Determine the moment of this force about the base of the pole at O. Solve the problem two ways, i.e., by using a position vector from O to A, then O to B. Explain why both methods will produce the same result. 5.If FB= 30 lb and FC= 45 lb, determine the resultant moment about the bolt located at A.