ch11-p070 - abh , which means the mass is abh (where = 2640...

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70. Item ( i ) in Table 10-2 gives the moment of inertia about the center of mass in terms of width a (0.15 m) and length b (0.20 m). In using the parallel axis theorem, the distance from the center to the point about which it spins (as described in the problem) is ( a /4) 2 + ( b /4) 2 . If we denote the thickness as h (0.012 m) then the volume is
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Unformatted text preview: abh , which means the mass is abh (where = 2640 kg/m 3 is the density). We can write the kinetic energy in terms of the angular momentum by substituting = L /I into Eq. 10-34: K = 1 2 L 2 I = 1 2 (0.104) 2 abh (( a 2 + b 2 )/12 + ( a /4) 2 + ( b /4) 2 ) = 0.62 J ....
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