A plank of mass 3m is placed on a rough inclined plane and a man of mass m walks down the board. If the coefficient of friction between the board and inclined plane is mu = 0.5, the minimum acceleration of does not slide is:

A plank of mass 3m is placed on a rough inclined plane and a man of ma

1.	A plank of mass 3m is placed on a rough inclined plane and a man of mass m walks down the board. If the coefficient of friction between the board and inclined plane is mu = 0.5, the minimum acceleration of does not slide is:
Answer» `8 m//s^(2)` `4 m//s^(2)` `6 m//s^(2)` `3 m//s^(2)` ANSWER :a