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 B

The weight of a 20 lb oven door acts vertically through point D. The door is supported by a hinge at point A and two springs are symmetrically located on each side of the door. The resultant moment about point A of the weight and spring forces is zero. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. 8 in. 12 in. 5 in. -10 in.- = Based on the values of Fobtained for a 45° and a 90°, determine the stiffness of the springs. (Round the final answer to four decimal places.) The stiffness of the springs is [ lb/in.

Replace the force system acting on the post by a resultant force and couple moment at point O. 300 lb 30° 150 lb 2 ft Question 5 2 ft 200 lb 2 ft

Problem 3 Determine the moment exerted by cable AB about point C. The force in the cable is 700 lbs. 6 ft X Z 4 ft B 4 ft D 6 ft 6 ft

Express and identify the resultant of the two forces and one couple shown acting on the shaft angled in the x-z plane. Assume F = 350 lb, M = 310 lb-ft, a = 8 in., b = 22 in., 0 = 17% 10 F. a -M k) lb-in. i Answer: M = (i b F Ө i+ i j+

Chapter 2, Problem 2/127 A 2.0-lb force is 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). 0.9 2.0 3.3" Ib C. B 23° Answers: MA = ( i+ k) Ib-in. MAB = (L Ji+l k) Ib-in.

If P= 20 lb in the figure, replace the three couples with a single equivalent couple, specifying its magnitude and the direction of its axis.

3. Compute the moment of the 0.4-lb force about the pivot O of the wall-switch toggle. F = 0.4 lb 30°