A hook is fashioned by bending a 8.0 mm wide metal bar into the shape shown. A force of 85 N is applied at D. The strength of the metal limits both the shear stress and the bending stress to 70 MPa. Determine the dimension 'a' of the bar such that the strength is not exceeded. Your solution must demonstrate that the bar is safe for both bending stress and transverse shear stress. 120 mm 50 mm F 40 mm

The supporting wheel on a scaffold is held in place on the leg using a 4-mm-diameter pin as shown. (Figure 1) Figure 1 of 1 > Part A If the wheel is subjected to a normal force of P = 3.3 kN, determine the average shear stress developed in the pin. Neglect friction between the inner scaffold puller leg and the tube used on the wheel. Express your answer to three significant figures and include the appropriate units. Tavg= Submit Provide Feedback Value A Request Answer C Units ? Next >

1200 N 2. For the bone shown to the left, assume the cross-section at C can be approximated as annular, with an outer diameter of 25mm. When the 1200 N forces are applied, the average normal stress in the bone at point C is determined to be 3.80 MPa. Determine the inner diameter of the bone cross section at C. Ans: d; = 14.93 mm 4 in. P 3 in. B 1200 N "UI 8

The bolted connection illustrated below comprises one bolt and two plates. The bolt, which has a diameter of 20 mm, is threaded through a 22- mm diameter hole in both plates. The shear stress of the bolt is 78,000 MPa. Based on this information, determine the following What is the largest force F that can be placed on the joint without shearing the bolt? what is the normal stress, at the gross section area, in each plate? what is the normal stress, at the net section area, in each plate? what is the bearing (or contact) stress between the bolt and each plate?

Determine the resulting maximum value of the normal stress. Specify the orientation of the plane on which these maximum values occur.   **The answer is tensile stress is 0 ksi at 90 degrees.  **The answer is compressive stress is 7 ksi at 0 degrees.  Can you explain how that is? This was my thought process: I know that tensile would be zero because the force P is actually going inwards and not outwards. I know that means that there would be a compressive force. I am confused on the angles, how is a tensile force going 90 degress if there technically is no force in the tensile direction. And how is there a compressive force at 90 degrees if there is a stress? thank you!