A uniform slender rod of mass m and length L is released from rest, with its lower end touching a frictionaless horizontal floor. At the initial moment, the rod is inclined at an angle θ=30∘ with the vertical. Thent he value of normal reaction from the from the floor just after release will be 4mg /7 In the above problem, the initial acceleration of the lower end of the rod will be

Options

A. `gsqrt(3)//4`
B. `gsqrt(3)//5`
C. `3gsqrt(3)//7`
D. None of these

Explanation

`a_(P)=(OP)alpha`
`=((l)/(2)cos30^(@))((12)/(7)(g)/(l))`
`=(3sqrt(3)g)/(7)`