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

A rod PQ of mass M and length L is hinged at end P. The rod is kept ho

1.	A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a mass less than string tied at a point Q as shown in figure. When string is cut, the initial acceleration rod is:
Answer» `(3g)/(2L)` `g/L` `(2g)/L` `(2g)/(3L)` Solution :`tau=I alpha, tau=L/2Mg` `I=(ML^(2))/3` `L/2Mg=(ML^(2))/3xxalpha` `:.alpha=(3g)/(2L)`