A bridge of length 50.0 m and mass 7.60 × 104 kg is supported on a smooth pier at each end as shown in the figure below. A truck of mass 3.30 × 104 kg is located 15.0 m from one end. What are the forces on the bridge at the points of support? A 15.0 m 50.0 m normal force at point A normal force at point B Z Z N N B

Figure for Question # 18. Y 18. A uniform plank is supported by two equal 120-N forces at X and Y, as shown. The support at X is then moved to Z (half-way to the plank center). The supporting forces at Y and Z are then: * O A. F_Y=240 N, F_Z=120 N O B. F_Y=200 N, F_Z=40 N O C. F.Y=40 N, F_Z=200 N O D. F_Y=80 N, F_Z=160 N O E. F_Y=160 N, F_Z=80 N

In the figure below, the horizontal boom is uniform and has the same weight as the hanging weight at its end. The boom is supported by the cable with a tension T. The angle between the boom and the cable is 30°. What is the magnitude of horizontal force Fx exerted by the wall on the boom? Fy Fx W

A uniform horizontal beam with a length of 8 m and a weight of 200 N is attached to a wall by a pin connection. Its far end is supported by a cable that makes an angle of 53° with the beam. If a 600-N person stands 2 m from the wall. What is the tension in the cable? 53.0% 8.00 m A. 196 N B. 502 N C. 313 N D. 410 N E. None Previous page Next page II

F, y mg AF f.y F, fx e Axis The ladder in the picture has a mass of 39 kilograms and a length 3 meters. What is the normal force pushing the ladder up from the floor? This force is labeled Ff y in the picture. FN N. %D Assume that the ladder's weight is evenly distributed, so it can be treated as a single force through the middle. If the ladder is at a 69° angle from the ground, what is the torque exerted by the weight (using the floor as the pivot point)? N.m The torque from the ladder must be balanced by the torque caused by the normal force on the wall, labeled Fw in the picture. Calculate this force. Fw - N. The normal force from the wall must be balanced by the friction force from the floor, labeled Ff x.in the picture. Determine the minimum coefficient of friction to keep the

Consider the 120-cm board supporting three loads as shown below. The beam weighs 45 grams. If the system is in equilibrium, a. what is the magnitude of the force exerted by the pin support to the board? b. Find the perpendicular distance, x, of the pin support from the left end of the board. 30cm A В C 259 30g 75g

A street light hangs from a traffic pole as shown in the figure. The uniform aluminum pole AB is 7.2 m long and has a mass of 12.0 kg. 3.80 m 37 D B The massless cable CD can withstand a maximum tension of 820 N before it breaks. What is the maximum mass of the traffic light that can be attached before the cable breaks?

Consider the following figure. A beam with a length of 3.0 m and a mass of 100 kg is held by two supports. A student with a mass of 80 kg is standing on the beam 1 m away from the second support. Determine the forces F1 and F2. F₁ 2m Wbeam W. 1m student

A uniform plank of length 2.00 m and mass 31.0 kg is supported by three ropes, as indicated by the blue vectors in the figure below. Find the tension in each rope when a 685-N person is d = 0.500 m from the left end. magnitude of IN N magnitude of T magnitude of ₂ N Need Help? L 1₁. T₂C -2.00 m Read It Watch It 40,0⁰

A bridge of length 50.0 m and mass 8.10 x 104 kg is supported on a smooth pier at each end as shown in the figure below. A truck of mass 2.80 x 104 kg is located 15.0 m from one end. What are the forces on the bridge at the points of support? 15.0 m 50.0 m normal force at point A N normal force at point B