Exercicios Resolvidos do Halliday sobre Rotação- Cap11- Exercicio 36

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36. (a) Using Table 11-2(c), the rotational inertia is
I =
1
2
mR2 =
1
2
(1210 kg)
(
1.21m
2
)2
= 221 kg·m2 .
(b) The rotational kinetic energy is, by Eq. 11-27,
K =
1
2
Iω2
=
1
2
(
2.21× 102 kg·m2) ((1.52 rev/s)(2π rad/rev))2
= 1.10× 104 J .
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