A uniform 1200 N beam that is 3.50 m long is suspended horizontally by two vertical wires at its ends. A small but dense 550 N weight is placed on the beam 2.00 m from one end, as shown in the figure. The tensions, A and B, in the two wires are: OA 8190 N, B = 8960 N = OA 836 N, B = 914 N OA 875 N, B = 875 N = OA 914 N, B = 836 N OA=8960 N, B = 8190 N B 2.00 m 3.50 m
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- The guy wires AB and AC are attached to the top of the transmission tower. The tension in cable AB is 8.6 kN. Determine the required tension Tin cable AC such that the net effect of the two cables is a downward force at point A. Determine the magnitude R of this downward force. Assume a = 45m, b = 56 m, c= 26 m, and d=32 m Answers: i Ri KN kNThe guy wires AB and AC are attached to the top of the transmission tower. The tension in cable AB is 9.1 kN. Determine the required tension Tin cable AC such that the net effect of the two cables is a downward force at point A. Determine the magnitude R of this downward force. Assume a = 30 m, b = 40 m, c = 28 m, and d = 36 m. d B Answers: T= i 8 R= a b KN KNThe figure below shows a horizontal rod, of length 2.6 m, with forces acting on it. A 30 N force acts at its left end, point 0, in a direction down and to the left, 45° below horizontal. A 25 N force acts at its center, point C, in a direction up and to the right, 30° to the right of vertical. A 20 N force acts at the right end, in a direction down and to the right, 20° below horizontal. (25 N 30 45° 20° 1.3 m 10 N 2.6 m 30 N (a) What is the net torque (in N m) on the rod about an axis through O perpendicular to the page? magnitude direction counterclockwise (b) What is the net torque (in N m) on the rod about an axis through C perpendicular to the page? magnitude direction counterclockwise v
- The guy wires AB and AC are attached to the top of the transmission tower. The tension in cable AB is 9.1 kN. Determine the required tension Tin cable AC such that the net effect of the two cables is a downward force at point A. Determine the magnitude R of this downward force. Assume a = 38 m, b = 49 m, c = 21 m, and d = 32 m. İyi Answers: T= i R= i KN KNA hungry bear weighing 705 N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam (see the figure below). The beam is uniform, weighs 200 N, and is 5.50 m long, and it is supported by a wire at an angle of θ = 60.0°. The basket weighs 80.0 N.The 6.8-kg frame AC and 2.8-kg uniform slender bar AB of length lslide with negligible friction along the fixed horizontal rod under the action of the 75-N force. Calculate the tension Tin wire BC and the magnitude FA of the force exerted on the bar by the pin at A. The x-y plane is vertical. 75 N 52° 52 B Answers: T = ! N FA = ! N lle
- The cable AB prevents bar OA from rotating clockwise about the pivot O. If the cable tension is 820 N, determine the n- and t- components of this force acting on point A of the bar. A 2.0 m B Answers: Tn= i Tt= i 1.6 m 74° N N26A traffic light hangs from a pole as shown in the figure below. The uniform aluminum pole AB is 6.50 m long and has a mass of 14.0 kg. The mass of the traffic light is 20.0 kg. Determine the vertical and horizontal components of the force exerted by the pivot A on the aluminum pole. 37 3.80 m Q 150 N, 300 N O 220 N, 347 N Q 362 N, 333 N ( 410 N,328 N Q 200 N, 400 N A OOD
- The guy wires AB and AC are attached to the top of the transmission tower. The tension in cable AB is 10.0 kN. Determine the required tension Tin cable AC such that the net effect of the two cables is a downward force at point A. Determine the magnitude R of this downward force. Assume a = 50 m, b = 56 m, c = 37 m, and d = 42 m. B Answers: T= R= i Mi a A b ! KN ME KNA hungry bear weighing 730 N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam (see the figure below). The beam is uniform, weighs 200 N, and is 7.00 m long, and it is supported by a wire at an angle of θ = 60.0°. The basket weighs 80.0 N. A horizontal plank is attached at the left end to a vertical wall. A rod with a pulley at the right end extends a distance x horizontally to the right from the wall above the plank. A cable connected to the wall just above the rod goes around the pulley then down and right to the end of the plank, making an acute angle θ with the plank. A basket of goodies hangs down from the right end of the plank and a bear stands on the plank below the rod a distance x from the wall. (a) Draw a force diagram for the beam. (Submit a file with a maximum size of 1 MB.) This answer has not been graded yet. (b) When the bear is at x = 1.10 m, find the tension in the wire supporting the beam. NWhen the bear is at x…A car is stuck in the mud. A tow truck pulls on the car with the arrangement shown. The tow cable is under a tension of 2 500 N and pulls downward and to the left on the pin at its upper end. The light pin is held in equilibrium by forces exerted by the two bars A and B. Each bar is a strut; that is, each is a bar whose weight is small compared to the forces it exerts and which exerts forces only through hinge pins at its ends. Each strut exerts a force directed parallel to its length. Determine the force of tensionor compression in each strut. Proceed as follows. Make a guess as to which way (pushing or pulling) each force acts on the top pin. Draw a free-body diagram of the pin. Use the condition for equilibrium of the pin to translate the free-body diagram into equations. From the equations calculate the forces exerted by struts A and B. If you obtain a positive answer, you correctly guessed the direction of the force. A negative answer means that the direction should be reversed,…