Figure 12-16 shows four overhead views of rotating uniform
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Figure 12-16 shows four overhead views of rotating uniform disks that are sliding across a frictionless floor. Three forces, of (a) (b) (c) (d) Fig. 12-16 Question 3. au ESTIONS 319 (12-24) where !!.xlL is the shearing strain of the object, !!.X is the displacement of one end of the object in the direction of the applied force F (as in Fig. 12-10b), and G is the shear modulus of the object. The stress is FIA. Hydraulic Stress When an object undergoes hydralllic compression due to a stress exerted by a surrounding fluid, Eq. 12-22 is written as !!. V p = B V' (12-25) where p is the pressure (hydraulic stress) on the object due to the fluid, !!. VIV (the strain) is the absolute value of the fractional change in the object's volume due to that pressure, and B is the bulk modulus of the object. magnitude F, 2F, or 3F, act on each disk, either at the rim, at the center, or halfway between rim and center. The force vectors rotate along with the disks, and, in the "snapshots" of Fig. 12-16, point left or right. Which disks are in equilibrium?
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