Problem 2. (10 points)
compute the wm for the composite setion for the floor system shown. assume that the
compressive strength of concrete is f = 4.5 ksi.
girder
bear
4 @ 25ft - 30
figure 1: floor plan
-
-
13% in slab
13 in deck
w16 x 31
figure 2: interior beam cross section

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed