2. Find the value of P and F so that the four forces shown in the figure produce an upward resultant of 300 lb acting at 4 ft from the left end of the bar. 100 lb F 200 lb. 2' 3' 2"
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- Determine the vertical distance from the lower edge of the built-up wooden beam to the location of the centroid. 2.00" 12" 2.00" Answer: H = i 15" 10" 2.00" H in.1. Find the distance x (measured along AB) at which a horizontal force of 60 lb should be applied to hold the uniform bar AB in the position shown. Bar AB is 10 ft long and weighs 140 lb. The incline and the flpor are smooth. 60 lbDetermine the magnitude Pof 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 231 lb with center of gravity at G. 25* 16" Answer: P-1 B 18' 21" lb
- The length of bar is 10 ft. What is the value of the unknown mass, m slug to maintain the bar in a horizontal position? 3' 12 Ib9. A rod of mass m is on a point support. The distance from theis point to one of the rod's ends is 1/4 of the rod length. A vertical thread is to the second end (see figure). The thread tension. a) 4). b) 2). mg/2| c) 3). mg/3 d) 1). mg/4Three loads are applied to a beam as shawn. The beam is supported by a roller at A and a pin at B. Neglecting the weight of the beam, determine the reactions at A and B when P = 15 kips. -3ft
- The homogenous 79 kg disk supported by the rope AB rests against a rough vertical wall. Determine the following: 21. Determine the force acting on the cable. Neglect friction. 22. Determine the force acting on the cable. Use coefficient of friction = 0.70The uniform bar with end rollers weighs 85 lb and is supported by the horizontal and vertical surfaces and by the wire AC. Calculate the tension Tin the wire and the reactions against the rollers at A and at B. 1.9' B 3.5' A 4.1' Answers: T= i 82.3 Ib A = i 19.5 Ib В - i 49.8 Ib Save for Later Last saved 4 days ago. Attempts: 0 of 1 used Submit Answer Saved work will be auto-submitted on the due date. Auto- submission can take up to 10 minutes.4. How would you calculate the force at the end of a 24' arm if 10Nm were applied on the other end?
- 5. An oil drum of radius 28 cm and mass 20 kg is to be rolled up over a curb that is 15 cm high by applying a force through the symmetry axis of the drum. What minimum force is required? mg R LL F PA typical car has an axle with 1.10 cm radius driving a tire with a radius of 27.5 cm . What is its mechanical advantage assuming the very simplified model in Figure 9.25(b)?In Figure 9.21, the cg of the pole held by the pole vaulter is 2.00 m from the left hand, and the hands are 0.700 m apart. Calculate the force exerted by (a) his right hand and (b) his left hand. (c) If each hand supports half the weight of the pole in Figure 9.19, show that the second condition for equilibrium (net =0 ) is satisfied for a pivot other than the one located at the center of gravity of the pole. Explicitly show how you follow the steps in the Problem-Solving Strategy for static equilibrium described above. Figure 9.21 A pole vaulter is holding a pole horizontally with both hands. The center of gravity is to the left side of the vaulter.