Timothy A. Philpot - Mechanics of materials _ an integrated learning system-John Wiley (2017)

ExERcISES
m12.1 the Amazing Stress Camera. Interactive discovery activity
that introduces the topic of stress transformations.
m12.3 Sign, Sign, Everywhere a Sign. A game that focuses on
the correct sign conventions needed in the stress transformation
equations. The game is won when two calculations for σ n and τ nt
are correctly completed.
FIGURE m12.1
m12.2 top–Drop–Sweep the Clock. Animated instruction
teaching the proper method for determining θ. Eight easy multiplechoice
questions.
FIGURE m12.3
FIGURE m12.2
pRoBLEmS
p12.15–p12.18 The stresses shown in Figures P12.15–P12.18
act at a point in a stressed body. Determine the normal and shear
stresses at this point on the indicated inclined plane.
13.6 ksi
90 MPa
94.5 MPa
70°
7.2 ksi
40°
105 MPa
30 MPa
2
147 MPa
63.0 MPa
50° 136.5 MPa
5
85 MPa
FIGURE p12.15
FIGURE p12.16
FIGURE p12.17
FIGURE p12.18
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