A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a massless string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is

Question

${{2g} \over L}$

${{2g} \over {2L}}$

${{3g} \over {2L}}$

${g \over L}$

Solution

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