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Figure shows particles 1 and 2, each of mass m, fixed to the ends of a rigid massless rod of length `L_(1)+L_(2),"with "L_(1)=20cmandL_(2)=80cm`. The rod is held horizontally on the fulcrum and then released. What are the magnitudes of the initial accelerations of (a) particle 1 and (b) particle 2?

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(a) 1.7 m/s, (b) `6.9m//s^(2)`
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