Chapter 6: Section 1 (part 2) Part D: Q: What is , the sum of the x components of the forces acting on block 2? Take forces acting up the incline to be positive. A: = Part E: Q: Now determine , the sum of the y components of the forces acting on block 1. Take forces acting upward as positive. A: = Part F: Q: In this problem, the fact that the length of the string does not change imposes a constraint on relative accelerations of the two blocks. Find a relationship between the x component of the acceleration of block 2, , and the acceleration of block 1. Pay careful attention to signs. A: = Part G: Q: Solve and check In the previous parts, you obtained the following equations using Newton's 2nd law and the constraint on the motion of the two blocks: and Solve these equations to find . Before you enter your answer, make sure it satisfies the special cases you already identified: • if and • if and . Also make sure that your answer has dimensions of acceleration. A: =