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Engineering Mechanics: Statics
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- A crate of mass 80 kg is held in the position shown. Determine (a) the moment produced by the weight W of the crate about E, (b) the smallest force applied at A that creates a moment of equal magnitude and opposite sense about E, (c) the magnitude, sense, and point of application on the bottom of the crate of the smallest vertical force that creates a moment of equal magnitude and opposite sense about E.arrow_forwardThe turnbuckle is tightened until the tension in cable AB is 1.2 kN. Calculate the magnitude of the moment about point O of the force acting on point A.arrow_forwardCompute the magnitude of the moment MO of the 220-lb force about the axis O-O.Assume F = 220 lb, d = 17 in., H = 10.8 in., h = 5.4 in., 36°, and 61°.arrow_forward
- The turnbuckle is tightened until the tension in cable AB is 2.9 kN. Calculate the magnitude of the moment about point O of the force acting on point A.arrow_forwardThe top viewv of a revolving entrance door is shown. 0.8 m Two persons simultancously approach the door and exert forces of equal magnitudes as shown. If the resulting moment about the door pivot axis at a is 25 N .m, determine the force magnitude F from the following answers which of them is correct: 0.8 m 15° O M= 16.18 N.m O M= 0 N.m O M= 18.16 N.m M = 181.16 N.m O M= 161.8 N.marrow_forwardB. determine the moment M, about point O for the force system shown below. What is the direction of rotation? F1 = 10 N 1 m 4 m 60° F2 = 15 N F3 = 20 Narrow_forward
- A gate is held in the position shown by cable AB. If the tension in the cable is 5.15 kN, determine the moment Mo made by the tension (as applied to point A) about the pivot point O of the gate.arrow_forwardA solid cylindrical shaft anchored to the wall at point O is subjected to 70 N and 85 N couples and a concentrated moment at point E. Determine the resultant couple moment. Hint: You can do this in either of two ways by applying (1) a "scalar" approach by evaluating the individual moments of the x, y, and z components of the 70N and 85N forces, taking positive moments to be in the positive coordinate directions according to the right-hand rule., or (2) the "vector approach" utilizing 3D position vectors using the general cross product definition for the force moment. 70 N 0.8 m 1.2 m 2 6 70 N 1.2 m 0.8 m 9 85 N 12 9 12 -1.2m 1.5m 8 D 85 N C 8 E 200 N·m Xarrow_forwardDraw the free body diagram. Also make it clear and understandable thank you.arrow_forward
- A 2.0-lb force Fis applied to the knob of the window-opener mechanism when the crank BC is horizontal. Determine the moment of the force about point A and about line AB (report both answers as vectors). Assume a = 1.9 in., b = 2.5 in., c= 1.2 in., and 0 = 21°. C Barrow_forwardwhy is only the position vector ab used? why is the force in cable cad not used?arrow_forwardThe 6.4-kN force F is applied at point A. (a) Compute the moment of F about point O, expressing it both as a scalar (positive if CCW, negative if CW) and as a vector quantity. (b) Determine the coordinates of the points on the x- and y-axes about which the moment of F is zero. Assume XA = 0.8 m, yд = 1.2 m, a = 7, b = 11. y, m I 1 A (x, y) F b a -x, marrow_forward
- International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L