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Discussion

FOUR-STEP PLAN

Step 1: FBD – Draw individual free body diagrams of A and B, along with an FBD of pulley C.

Step 2: Newton – From each FBD, write down the Newton’s equation for components along the incline. Recall that the pulley has negligible mass.

Step 3: Kinematics – You will need to use the cable-pulley system kinematics that we worked with earlier in the semester. Please review the material from Section 1.D of the lecture book to relate the accelerations of blocks A and B.

Step 4: Solve – Combine your equations from Steps 2 and 3 to solve for the accelerations of blocks A and B.