[问答题]
An Atwood’s machine consists of 
n5c(xi  xp3b+apbh.l 1)lqlid(-r-jz  two mas
yn;21db w0 b hvp-52x hl0qkzt7 c7ofqses, $m_1$ and $m_2$ which are connected by a massless inelastic cord that passes over a pulley, Fig. 8–47. If the pulley has radius R and moment of inertia I about its axle, determine the acceleration of the masses $m_1$ and $m_2$ and compare to the situation in which the moment of inertia of the pulley is ignored. [Hint: The tensions $F_{T1}$ and $F_{T2}$ are not equal. We discussed this situation in Example 4–13, assuming   for the pulley.]
