Chapter 4, Problem 72P

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Current Attempt in Progress The 4.0-lb force is applied at point A of the crank assembly. Determine the moment of this force about point O. F = 4.0 lb 22 0.60" -y 2.10". Answer: Mo =( i i+ i j+ i k) Ib-in.

Replace the two forces acting on the rectangular solid by a wrench. Write the force R and moment Mas vectors and specify the coordinates of the point Pin the x-y plane through which the line of action of the wrench passes. 240 mm 450 mm 160 N 160 N 360 mm Answers: R= (i it j+ i k) N M-( it j+ i k) N-m Coordinates of point P. (ху) - ( )mm

The pipe assembly is subjected to three forces of F1 = {3.00, 4.00, -2.00} kip, F2 = {0, 0,-4.00} kip, and F3 = {-3.00, 0, 0} kip. Determine the sum of the moment of the forces 1) about x-axis (the unit vector of x is i) and 2) about line AC. Express the result as a Cartesian vector.

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The 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.m

The 30N force P is applied perpendicular to the portion BC on the bent bar . Determine The moment of P about point B and about point A.

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The wrench is used to tighten a nut on the wheel. Determine the moment of the 120-lb force about the origin O. Express your answer in vector form.