Consider a rigid steel beam of length L = 13 m and mass mb = 378 kg resting on two supports, one at each end. A worker of mass mw = 61 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.  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.  FB = When the worker sits at a distance x = 8.5 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.  FB = The force exerted on the beam by support A is measured and found to be FA = 2280 N. At what distance x, in meters, from support A is the worker sitting now?

(a) A 4.53 kg salami is supported by a cord that runs to a spring scale, which is supported by another cord from the ceiling (see Figure (a)). What is the reading on the scale, which is marked in weight units? (b) In Figure (b) the salami is supported by a cord that runs around a pulley and to a scale. The opposite end of the scale is attached by a cord to a wall. What is the reading on the scale? (c) In Figure (c) the wall has been replaced with a second 4.53 kg salami on the left, and the assembly is stationary. What is the reading on the scale now? Spring scale Spring scale (6) Spring scale (a) (c) (a) Number i Units (b) Number i Units (c) Number i Units

When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in Figure a. The total is supported by the force n exerted by the floor on the toes of one foot. A mechanical gravitational force on the body, F model of the situation is shown in Figure b, where T is the force exerted by the Achilles tendon on the foot and R is the force exerted by the tibia on the foot. Find the values of T, R, and 0 when F, = n = 770 N. (For 0, enter the smaller of the g' two possible values between 0° and 90°.) -Achilles tendon Tibia 15.0° 18.0 cm 25.0 cm a T = R = N = Submit Answer

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What's the force on each rope if the person is standing 1.75 m from one end?

A 1,375 N dowel is held in place by a light cord at an angle = 25.5° to the horizontal as shown in the figure. The dowel is attached to a pivot at the bottom, and a mass of weight w= 1,825 N hangs from its top. The dowel makes an angle of p = 64.5° with the horizontal. Assume the dowel is uniform. (a) Find the tension in the supporting cord (in kN). KN (b) Find the components of the reaction force (in kN) exerted by the floor on the dowel. horizontal component: magnitude direction KN -Select-O vertical component: magnitude direction kN --Select-O

A hungry bear weighing 735 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 0 = 60.0°. The basket weighs 80.0 N. (a) Draw a force diagram for the beam. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen Goodies This answer has not been graded yet. (b) When the bear is at x = 1.14 m, find the tension in the wire supporting the beam. X Your response differs from the correct answer by more than 10%. Double check your calculations. N Fx When the bear is at x = 1.14 m, find the components of the force exerted by the wall on the left end of the beam. (Assume the positive +x direction is to the right and the positive +y direction is upward. Include the sign of the value in your answer.) = X Your response differs from the correct answer by more than 10%. Double check your calculations. N = X Your…

A fence post of mass m = 8 kg supports a fence with three lengths of barbed wire. The bottom wire is a distance d = 0.35 m from the ground and each wire is a distance 0.35 m above the previous one. Each of these three wires has the tension on it. For this problem, assume that the force exerted by these wires is purely horizontal. An additional guy wire is used to keep the pole upright with a tension of Fa = 490 N. The guy wire attaches to the post at a point h = 0.86 m above the ground and makes an angle of θ = 45 with respect to the horizontal. Write an expression for the tension in any one of the three fence wires.  What is the normal force that the ground exerts upward on the post?

The figure below shows a bird feeder that weighs 100.1 N. The feeder is supported by a vertical wire, which is in turn tied to two wires, each of which is attached to a horizontal support. The left wire makes a 60° angle with the support, while the right wire makes a 30° angle. What is the tension in each wire (in N)

3: #3 4. A 115 kg scaffold is 6.60 m long. It is hanging with two wires, one from each end. A 600 kg box sits 1.70 m from the left end. What is the tension in the right hand side wire?(g = 9.8 m/s²) X 4929 Newtons E D 80 F3 C 5. An object weighing 255 N is supported by a uniform 135 N horizontal beam as shown in the figure. The length of the 4 R F F4 V do 50 % T F5 G ^ 6 B tv MacBook Air Y H & 7 N AA F7 U J * 00 8 M DII F8 1 K DD F9 О F10 P 10 zoom C { + ISOIT P by m 04 M vamies or roe puffer F12 delete 1 EL