SP5. Two blocks tied together by a horizontal string are being pulled across the table by a horizontal force of 30 N as shown. The 2-kg block has a 6-N frictional force exerted on it by the table, and the 4-kg block has an 8-N frictional force acting on it. a. What is the net force acting on the entire two-block system? b. What is the acceleration of this system? c. What force is exerted on the 2-kg block by the con- necting string? (Consider only the forces acting on this block. Its acceleration is the same as that of the entire system.) d. Find the net force acting on the 4-kg block and calculate its acceleration. How does this value compare to that found in part b? 2 kg 4 kg 30 N 6 N 8 N SP5 Diagram