Question

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 ______.

Options

• g/L

• 2g/L

• `(2"g")/(3"L")`

• `(3"g")/(2"L")`

Answer 1

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 `underlinebb((3"g")/(2"L"))`.

Explanation:

angular acceleration α = `(3"g")/(2"L")`