Acceleration of Beam with Inertia

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To determine the initial acceleration of end B of a suspended rod when the string on side B is cut, the relevant equations of motion must be applied. The mass of the rod is 1.40 kg, and its length is 57.0 cm. The moment of inertia for the rod is calculated using I = mL^2/3. Both translational and rotational dynamics are considered in the analysis, as the rod will experience both types of motion upon the string being cut. The initial acceleration can be derived from these principles, leading to a comprehensive understanding of the system's behavior.
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A rod of length 57.0 cm and mass 1.40 kg is suspended at each end by a 44.0 cm string. The string on side B is cut. Find the magnitude of the initial acceleration of end B.
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A BF=ma, I=mL^2/3Would both rotational and translational energy be applied? I really have no clue where to start
 
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B is supposed to be on the right side of the beam, both have equal lengths
 

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