If the Empty Weight C.G of an airplane lies within the Empty Weight C.G limits, is an adverse loading check needed? Explain

> box 01 E what is minimum coefficient of stare friction hassary to keep Jkg box stationary on the slide given a = 10° ? んんんんん6ay $100

Suppose that the pitch of the threads of the turnbuckle is p = 0.05 in, their mean radius is r= 0.25 in, and the coefficient of static friction between the threads and the mating grooves in 0.25. What is the pitch angle (in degrees) of the thread? 2.28 17.66 0.91 1.82 13.7 If T = 250 lb, what couple (in pound-in) must be exerted on the turnbuckle to start loosening it? * 15.5 10.3 20.7 27.1 13.5 If T = 250 lb, what couple (in pound-in) must be exerted on the turnbuckle to start tightening it? O 13.7 15.8 35.5 17.8 27.4

Question 3(a) The non uniform XYZ bar which weighs 155 kg has its centre of gravity G at a distance 4 m from X. This bar rests on a homogeneous crate P. The static coefficient of friction between the bar and the crate is 0.31 while the same between the crate and the floor is 0.22. Determine the mass of the lightest crate P (in kilograms) that can be used to support this non uniform bar in the position shown in Figure 3. The height of the crate is 4.32 m and the length of the bar is 8.59 m. 4 m 3 m - 1 m - Figure 3 Question 3(b) Take an example from everyday life where you can identify the application of the concepts we learn in the "Dry friction" module. Sketch this example and discuss about the effect of friction on that particular scenario. Sketch does not have to be drawn to a scale. (Description should be 250 words or less).