- 5. Two identical, uniform beams of length 3 m and weighing 260 N each are connected at one end by a frictionless hinge. A light horizontal crossbar, attached at the midpoints of the beams maintains an angle 50° between the beams. The beams are suspended from the ceiling by vertical wires so they form a V. See figure. (a) What force does the crossbar exert on each beam? (b) Is the crossbar under compression or tension, i.e. are the ends of the crossbar being pushed together or stretched farther apart? (c) What force (magnitude and direction) does the hinge exert on each beam? Crossbar Hinge

A uniform stick can be balanced on a knife edge 10cm from one end when a load of 200N is hung from that end. When the knife edge is moved 5cm further from the end, the 200N load has to be moved to a point 8.75cm from the knife edge to obtain a balance. Find the length of the stick and its weight.

A 60 kg uniform board 2.4 m long is supported by a pivot d=80 cm from the left end. How far from the left end should a 41.6 kg child sit so that the board is balanced? Answer: cm

A uniform rod is attached to a wall by a hinge at its base. The rod has a mass of 7.5 kg, a length of 2.3 m, is at an angle of 29° above the horizontal, and is held in place by a horizontal cord attached to the other end of the rod and bolted to the wall above the base of the rod. (a) Determine the tension in the cord. 63.715 X Where is a convenient point about which to take the torques? See if you can write an expression for the torque in terms of the force producing the torque and the perpendicular distance from the line of action of the force to the point about which we have specified to determine the torque. See if you can write a second condition of equilibrium that will allow you to determine the tension in the cord. N (b) Determine the horizontal and vertical components of the force exerted on the rod by the hinge. 36.788 X FH = Now that you know the tension in the cord from part (a), see if you can write a first condition of equilibrium statement that will allow you to…

(I) A tower crane (Fig. 9–48a) must always be carefully balanced so that there is no net torque tending to tip it. A particular crane at a building site is about to lift a 2800-kg air-conditioning unit. The crane's dimensions are shown in Fig. 9-48b. (a) Where must the crane's 9500-kg counterweight be placed when the load is lifted from the ground? (The counterweight is usually moved auto- matically via sensors and motors to precisely compensate for the load.) (b) Determine the maximum load that can be lifted with this counterweight when it is placed at its full extent. Ignore the mass of the beam. (a) Counterweight M = 9500 kg +3.4 m- 7.7 m m = 2800 kg FIGURE 9-48 (b) Problem 3.

A tightrope walker stands on a wire that is supported by a pole at each end. The tightrope walker creates a tension of 3.42 ✕ 103 N in a wire making an angle 6.2° below the horizontal with each supporting pole. Calculate how much this tension stretches the steel wire (in cm) if it was originally 16 m long and 0.50 cm in diameter. I asked this question THREE times and it was rejected the first two for being incomplete. It is not incomplete. There is no accompanying image. The third time, it was answered . . . incorrectly. I am very annoyed that I keep wasting my limited question attempts on ONE question that I am trying to understand how to do.

A tightrope walker stands on a wire that is supported by a pole at each end. The tightrope walker creates a tension of 3.42 ✕ 103 N in a wire making an angle 6.2° below the horizontal with each supporting pole. Calculate how much this tension stretches the steel wire (in cm) if it was originally 16 m long and 0.50 cm in diameter. There is no accompanying image. This is the complete question.

A 225 kg uniform, beam is hinged at one end and at the other is supported by a cable that is at 26 degrees to the left of the vertical. The beam is 2.8 m long and is at 8 degrees above the horizontalCalculate the tension in the cable (in N).

Physics A sign is hung from the wall of a building using an angled beam and a support cable. The beam(mass = 1500kg, length = 8m) is bolted to the wall and angled up at 30◦above the horizontal. Themass-less support cable is attached to the beam 2m from its far end and makes an angle of 40◦betweenthe beam and the cable. The sign (mass = 125kg) attaches to the beam a half-meter from the far endand hangs straight down. a- What is the tension in the cable? b- How hard does the beam push inward on the wall?