1. The problem statement, all variables and given/known data a)Find the magnitude of the acceleration of the two blocks in (Figure 1) . Assume the top block slides without friction on the horizontal surface. b)If the 12-N block in (Figure 1) is replaced with a 12-N force pulling downward, as in (Figure 2) , is the acceleration of the sliding block greater than, less than, or equal to the acceleration calculated in part A? Less than Greater than Equal to c)Calculate the acceleration of the block in (Figure 2) , assuming it slides without friction. 2. Relevant equations 3. The attempt at a solution I have attached a picture of my free body diagram. But I don't know where to start after that. I am thrown off because the number in the boxes are not masses.