Asmall block of mass m lies on the upper, inclined surface of a larger wedge of mass m, which in turn rests on a horizontal surface near the surface at sea level. the upper surface of the wedge is inclined at an angle φ to the horizontal, and the maximium coefficient of static friction between this surface and the upper block is μ. (a) w φ such that the upper block can remain motionless on the incline when the wedge is fixed in position? hat is the maximum value of (b) suppose instead that the wedge is accelerated in the horizontal direction. what is the minimal and maximal acceleration for the wedge, for which the block will remain on the wedge without slipping, if φ is less than the critical value determined in part (a)? (c) what is the minimal and maximal acceleration of the wedge, for which the block will remain on the wedge without slipping, if φ exceeds the critical value determined in part(a), (but is still acute ?