A uniform thin wooden plank AB of length L and mass M is kept on a table with its B end slightly outside the edge of the table. When an impulse J is given to the end B, the plank moves up with centre of mass rising a distance 'h' from the surface of the table. Then-

Options

A. `hgt9J^(2)//8M^(2)g`
B. `h=J^(2)//2M^(2)g`
C. `J^(2)//2M^(2)glthlt9J^(2)//8M^(2)g`
D. `hltJ^(2)//2M^(2)g`

Answer

C