a 300n girl and an 400n boy stand on a 16m platform supported by posts A and B. The platform itself weighs 200N. What are the forces exerted by the supports on the platform?
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a 300n girl and an 400n boy stand on a 16m platform supported by posts A and B. The platform itself weighs 200N. What are the forces exerted by the supports on the platform?
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- A uniform horizontal beam 5.00 m long and weighing 350 N is attached to a wall by a pin connection that allows the beam to rotate. Its far end is supported by a cable that makes an angle of 50 with the horizontal. If a person weighing 550 N stands 1.50 m from the wall, find the magnitude of the tension T in the cable and the force R exerted by the wall on the beam.3. Two people carry a heavy electric motor by placing it on a light board 2.00 m in length. One person lifts at one end with a force of 70ON, and the other lifts the opposite end with a force of 500N. What is the weight of the motor, and where along the board is its center of gravity located? (Note: The center of gravity of an object is the point where the weight passes through.)4. A uniform ladder 10m long and weighing 350N rests against a smooth wall at an angle of 30° with the wall. A 700N man stand 6m up from the bottom of the ladder. Find the horizontal force necessary at the base to keep the ladder from slipping. Draw the FBD
- The 80-lb block C rests on the uniform 15-lb bar AB. The cable connecting C to B passes over a pulley at D. Find the magnitude of the force acting between the block and the bar.The input piston and output plunger of a hydraulic car lift at the same level, as shown in the drawing. The cross-sectional area of the input piston is 12cm^2, while that of the output plunger is 1200cm^2. The force F1 is applied to the input piston had a magnitude of 150 N. What is the weight W of the car? Neglect the weight of the piston and plunger.A beam 3m long has a weight of 200N at one end and another weight of 80N at the other end. The weight of the beam itself is negligible. (a) Design the appropriate force arrangement or system (b) Find the balance point of the beam.
- 3. A 550 kg drawbridge has a hinge at one end and a cable attached to the other. It is stuck in a position where it makes an angle of 30° with the vertical. The cable pulling on the far end of the bridge is horizontal. Find the tension in the cable as well as the vertical and horizontal components of force from the hinge.The second photo has background info to help solve the practice problemQ3: The diagram shows the open bonnet of a car. The bonnet is vertical force V held open at an angle of 60° to the horizontal by a vertical force V applied at one end of the bonnet (shown on the diagram). The car bonnet bonnet is 0.90 m long, has a weight of 25 N and its center of gravity G is 0.35 m from the hinge at O. 0.90m 1) On the diagram, draw and label the two forces other than V acting on the bonnet. 2) By taking moments about O, show that the vertical force V applied at the end of the bonnet is 9.7 N. 60 horizontal hinge O 3) Calculate the magnitude of the force acting at the hinge O.