Q1-B- Draw just the Free Body Diagram of the following figures. 30 kN/m - 3 m - 3 m - 3 m --- 4 kN/m 8 kN/m m 10 kN/m 2 kN/m سال آینده ¡N/m 80 kN/m
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- Two steel wines support a moveable overhead camera weighing W = 28 lb (see figure part a) used For close-up to viewing of field action at sporting, events. At some instant, wire I is at an angle a = 22° to the horizontal and wire 2 is at angle fi = 40°. Wires I and 2 have diameters of 30and 35 mils, respectively. (Wire diameters are often expressed in mils; one mil equals 0.001 in.) (a) Determine the tensile stresses s and s2 in the two wires. (b) If the stresses in wires 1 and 2 must be the same, what is the required diameter of wire 1 ? (c) To stabilize the camera for windy outdoor conditions, a third wire is added (see figure part b). Assume the three wires meet at a common point coordinates (0, 0. 0) above the camera at the instant shown in figure part b. Wire I is attached to a support at coordinates (75 ft, 48 ft, 70 Ft). Wire 2 is supported at (-70 ft. 55 ft, 80 Ft). Wire 3 is supported at (-10 ft. -85 Ft, 75 ft). Assume that all three wires have a diameter of 30 mils. Find the tensile stresses in all three wiresIn the figure below, all the bearings are movable bearings and the C bearing is in an inclined position. Draw the M, N, T diagrams according to your force values. (20kN force is perpendicular to the beam it acts on. P1, P2, P3 forces are in the vertical direction.) q=7 kN/m P1=25 kN P2=27 kN P3=11 kNIf the width of the wedge used in the 3 cm diameter shaft, which transmits the motion received from the 34 - 3 HP motor at 400 rpm, is 8 mm and the length is 24 mm, what is the shear stress acting on this wedge?A) 186.5 daN / cm2B) 193.9 daN / cm2C) 93.25 daN / cm2D) 139.9 daN / cn2E) 168.5 daN / cm2
- In the design in the figure, a force of Fn=1912 N in the vertical plane and a torque of Md=916 Ncm in the clockwise direction of rotation act on a machine element with a diameter of D=200 mm on the shaft resting on the A and B bearings. If the angle of the force with the horizontal is b=49o, how many Newtons is the resultant radial force to be considered in the bearing calculation of the bearing A? 1-) The diameter of the machine element on which the force acts will not be taken into account in the calculation of the bearing forces (ie, it will be assumed that the Fn force acts on the axis of the shaft). 2-) Pi number will be taken as 3.14.Rod AB is fixed to a smooth collar D, which slides freely along the vertical guide shown below. Point C is located just to the left of the concentrated load P = 40 lb. Suppose that w = 11 lb/ft. Follow the sign convention. a) Determine the normal force at point C. Express your answer in pounds to three significant figures. b) Determine the shear force at point C. Express your answer in pounds to three significant figures. c) Determine the moment at point C. Express your answer in pound-feet to three significant figures.In machine design we usually compare the equivalent stress of the component with the: a) Allowable stress b) Machine stress c) Force d) Moment e) Torque
- Consider a uniform ladder of length 4.3 m and mass 10 kg. The ladder is falling over, pivoting about the end that is touching the ground. Someone is pushing on the top end of the ladder with a horizontal force of size 415 N. At the instant when the ladder makes a 46 degree angle with the horizontal, calculate the net torque on the ladder about its bottom end, in N m. Make your answer positive, and use g = 10 m/s2. (Please answer to the fourth decimal place - i.e 14.3225)What weight (kg) can be lifted by a double threaded screw that has an efficiency of 85% if it is opetated by a 52 lb force at the end of a 25 inches lever ?The pitch of the screw is 0.55 inchesPlease answer the problem completely. Show a free body diagram. Final answers: 1st section: 166.67 mPa 2nd Section: 55.56 mPa 3rd Section: 122.22 mPa