Scientist: Date: Period Me chani cal Advantage with Pul l e ys Purpose: Assemble a pulley system to create a mechanical advantage. Draw free body diagrams and apply Newton’s Law to accelerating systems. Materials: Assorted pulleys, neon-yellow str ing, accumul ated physi cs expert ise Procedure: 1. Assemble the following pulley system 2. Draw the f ree b ody di agrams for both M 1 and the bottom pulley in equilibrium. 3. What is the relationship between the tensions in each FBD (free body diagram)? 4. If M 2 equals 100g: a. What is t he weight on the bottom pu lley? b. Ca lc ul at e t he te nsio n i n t he st ri ng at eq ui li br iu m. ( ∑F=0) c. Using the tension fr om b. calculate the weight of M 1 . d. Now calculat e the mas s of M 1 . How does this value compare to M 2 ? Free Body Diagrams M 1 M 2
