Determine the magnitude P of the vertical force required to lift the wheelbarrow free of the ground at point B. The combined weight of the wheelbarrow and its load is 274 lb with center of gravity at G. 25" Answer: P = 19" i B 23" G 7" C lb 22"
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- 2. The horizontal beam in Fig. 1 weighs 150 N, and its center of gravity is at its center. Find (a) the tension in the cable and (b) the horizontal and vertical components of the force exerted on the beam at the wall.5) Consider a rigid steel beam of length L = 14.5 m and mass mb = 375 kg resting on two supports, one at each end. A worker of mass mw = 76 kg sits on the beam at a distance x from support A. Refer to the figure, though note that it is not drawn to scale. a) Enter an expression for the force support B must exert on the beam in order for it to remain at rest, in terms of defined quantities, x, and g. b) When the worker sits at a distance x = 7.5 m from support A, calculate the force, in newtons, that support B must exert on the beam in order for it to remain at rest. Use g with three significant figures. c) The force exerted on the beam by support A is measured and found to be FA = 2390 N. At what distance x, in meters, from support A is the worker sitting now?The center of gravity of a loaded truck depends on how the truck is packed. If it is 4.0 m high and 2.4 m wide, and its CG is 2.2 m above the ground, how steep a slope can the truck be parked on without tipping over (Fig. 9-81)? - 2.4 m- CG 4.0 m 2.2 m FIGURE 9-81 Problem 62.
- 3) A sandwich board advertising sign is constructed as shown in the figure below. Hinge Chain ©2011 Brooks/Cole Thomson Learning CG CG 0.50 m Uniform board (CG at center) 1.30m 1.10 m The sign's mass is 5.10 kg. (a)Calculate the tension in newtons in the chain assuming no friction between the legs and the sidewalk. N (b)What force is exerted in newtons by each side on the hinge?#7Aun is Q5/ If a Moment of M 300 N. m is applied to the flywheel, determine the force that must be developed in the hydraulic cylinder CD to prevent the flywheel from rotating. The coefficient of static friction between the friction pad at B and the flywheel is 0.4. 8/12 Hib 0.6 m 1m 30 IB 60 mm 0.3 m M = 300 N-m
- Equilibrium Drill/Due Today What mass must be placed at B in order to lift a 1000 kg mass at A? The mass of the Bar is 500 kg and its length is 20 m. The cable from mass B attaches 2/3 from the base of the bar. The angle between the bar and horizontal 0 = 30° BAR A ET=+=w cose + Twinkle D B L Tm cose - LT Sme=c Twill fintsMAN Two builders carry a sheet of drywall up a ramp. Assume that W = 1.9 m, L = 3.3 m, theta = 19.00, and that the lead builder carries a weight of 109.0 N (24.5 lb). 0 What is the weight carried by the builder at the rear? The builder at the rear gets tired and suggests that the drywall should be held by its narrow side. 0 W What is the weight he must now carry?9.4