The crate A of mass m and the wedge B on which it rests are moving together down the incli...

The crate A of mass m and the wedge B on which it rests are moving together down the incline with the acceleration aB as shown. The angle of the incline is θ = 30° with respect to the horizontal. Given that the coefficient of static friction between the crate and the wedge is μs = 0.6, determine the maximum value of aB before the crate starts to slip on the wedge.

Figure P3.12