If two ice the ramp, of the III 27. Figure Q4.27 shows block A sitting on top of block B. A constant force F is exerted on block B, causing block B to accelerate to the right. Block A rides on block B without slip- ping. Which statement is true? A. Block B exerts a friction force on block A, directed to the left. B. Block B exerts a friction force on block A, directed to the right. C. Block B does not exert a friction force on block A. FIGURE Q4.27 A B F