H.W.6: A hollow circular cold-rolled bronze [G = 6,500 ksi] tube (1) with an outside diameter of 1.75 in. and an inside diam- %3D eter of 1.25 in. is securely bonded to a solid 1.25-in.-diameter cold-rolled stainless steel [G, = 12,500 ksi] core (2) as shown in Figure and the allowable shear stress of core (2) is 60 ksi. Determine . The allowable shear stress of tube (1) is 27 ksi, (a) the allowable torque T that can be applied to the tube-and- core assembly. (b) the corresponding torques produced in tube (1) and core (2). (c) the angle of twist produced in a 10-in. length of the assembly by the allowable torque T. (1) (2) T. T.

Joe takes his little brother Andy down the the playground for an afternoon out. Andy would like to ride the seesaw, but the difference in their sizes, Joe weights 160lbs and Andy weighs 641lbs, makes this difficult. Joe sees a solution from his engineering class and moves the fulcrum from the middle to a new place. The seesaw is 3.5m long. After Joe moved the fulcrum how long was the seesaw on Joe's side?

Is this true or false? thank you

After years of asking, you finally were allowed to go on a joy ride in your uncle’s 1956 Mercedes-Benz 300 SL. A notable feature of this vehicle is the gullwing door design that opens from a hinge at the top of the car. Unfortunately, you are having so much fun driving the car that you end up submerged in a fresh water lake. You sink to the bottom of the lake, which has a depth of 10 m. For the sake of simplicity, you can model the door as a 1 m × 1 m square plate, inclined at 45° relative to the floor of the lake. Neglect the weight of the door and friction in the hinge. How much force will be required to open the door, assuming you push from its geometric center?