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- In order to lift a shovelful of dirt, a gardener pushes downward on the end of the shovel and pulls upward at distance l2 from the end, as shown below. The weight of the shovel is mg and acts at the point os application of F2 . Calculate the magnitudes of the forces F1 and F2 as functions of l1 , l2 , mg, and the weight W of the load. Why do your answers not depend on the angle that shovel makes with the horizontal?A uniform 30 lb beam 10 ft long is carried by two men A and B, one at each end of the beam. a. If a exerts a force of 25 lb, where must a loadof 50 lb be placed on the beam? b.What force does B exert?The figure shows an engine block with a mass of 250 kg suspended by ropes connected to a central ring at A. What is the tension (force) in the AB rope?
- in terms spiny bunou alli effect, Bernoulli Effect and Lift dict each r the paads sa aunssaud amo nor the rence without urring at e. Instead lower speed, anssaud sa APPLICATION 1. Terminal velocity is the speed at which a falling object's drag balances its weight. A particular object weighs 250 N and its terminal velocity is 50. m/s. What is the force of drag on it when it is falling at 50. m/s? When it is falting at 25 m/s? nces 2. Often, a' unwardAn exhaust system for a pickup truck is shown in the figure. The weights Wh, Wm, and W; of the head-pipe, muffler, and tailpipe are 9, 86, and 41 N, respectively, and act at the indicated points. If the exhaust-pipe hanger at point A is adjusted so that its tensions Fa is 62 N, determine the required forces in the hangers at points B, C, and D so that the force-couple system at point O is zero. Why is a zero force-couple system at O desirable? Fc FD FA FB 22° 22° c D B WmY r = 0,40 WAY F1.4-1.2 -0.50 0.50-0.40.3- Dimensions in meters Answers: FR = Fc = Fo NI dont undertand this hw problem.
- ... M VoMiFi What would be the maximum weight W of the block, shown in the following figure, so that the tension developed in any cable does not exceed 900 N: A 30° IIWhat are tbe conditions for an object to be in static equilibrium?9. A umiform 400 N boom is supported as slown in the figure bebow. Find the tension in the tie rope and the force exerted on the boon by the pin at P. L/4 3L/4 2000 N 50 d.
- A uniform drawbridge must be held at a 37° angle abovethe horizontal to allow ships to pass underneath. The drawbridge weighs45,000 N and is 14.0 m long. A cable is connected 3.5 m from thehinge where the bridge pivots (measured along the bridge) and pullshorizontally on the bridge to hold it in place. What is the tension in the cable?A large advertisement board (W) is held in position by cable F1, with a breaking strength of 1500 N and a wooden strut F2 with a breaking of 750 N. Calculate the maximum weight the board can hold.Determine the magnitude of force at the pin A and in the cable BC needed to support the 500 N load. Neglect the weight of the boom AB. (answer in metric system) 8 ft Ce 122° 35°