47. Two blocks are accelerated across a horizontal frictionless surface as shown below. Frictional forces keep the two blocks from sliding relative to each other, and the two move with the same acceleration. If F = 1.2 N and M = 1.0 kg, what is the horizontal component (frictional force) of the force of the small block on the large block? (A) 0.48 N to the right (B) 0.72 N to the right (C) 0.72 N to the left (D) 0.48 N to the left (E) 0.65 N to the left