Pulley+Demonstration+Assignment+Worksheet

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Dec 6, 2023

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Name Pulley Lab Assignment Pre-lab Questions: Use the information provided in the lab lesson to answer questions #1-8. 1. What is a fixed pulley? (3 points) 2. What is the mechanical advantage of a fixed pulley? (3 points) 3. What is a movable pulley? (3 points) 4. What is the mechanical advantage of a movable pulley? (3 points) 5. What is a block and tackle pulley? (3 points) Ashlyn A fixed pulley is a round pulley that is mounted at a fixed high point with one rope. The mechanical advantage of a fixed pulley is one because it only has one pulley, fixed point, and one rope. A movable pulley is a extra movable pulley that works in conjunction with a fixed pulley system. The mechanical advantage of a movable pulley is two because now it has two pulleys,and two fixed points. A block and tackle system is two or more pulleys working together to lift an object.
6. How do you determine the mechanical advantage of a block and tackle pulley? (3 points) Use this image to answer questions 7 -8. 7. What kind of pulley is this? (5 points) 8. What is the mechanical advantage of this pulley? (5 points) Demonstration/Lab Questions 9. From Video #1, list the masses (in grams) of the weights that will be used. (5 points) https://www.pngwing.com/en/search?q=pulley 1.Count the number of pulleys. 2. Count the number ofsupporting ropes. 3.Measure the distance of the roop needed to be pulled to lift the load.Then divide that by the distance the load was liffted. Box and Tackle. The answer is 4, because there are four ropes, and four pulleys. 500g,250g,100g, 50g,
Single Pulley Demonstration: Watch Video #2 to answer questions #10-14 10. What type of pulley is this? (5 points) 11. What was the mass of the weight that needed to be lifted (resistance force)? (5 points) 12. What happened when one 250 g weight was added as the effort force? (5 points) 13. What happened when a second 250 g weight was added to the effort force of the pulley? (5 points) 14. What is the mechanical advantage of this pulley? (6 points) Single fixed Pulley. 500g Nothing. The weight was equal on both sides, so the 500 g went up and the two 250g went down till they were parallel to each other. One because there is only one pulley.
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Double Pulley Demonstration: Watch Video #3 to answer questions #15-22 15. What type of pulley is this? (5 points) 16. What was the mass of the weight that needed to be lifted (resistance force)? (5 points) 17. What happened when 100 g was added as the effort force? (5 points) 18. What happened when one 250 g weight was added as the effort force? (5 points) 19. What is the mechanical advantage of this pulley? (6 points) Fixed double pulley. 500g. Nothing. The 250 g weight dropped to the floor and the 500 g weight lifted off the floor. 2 because there are two pulleys.
20. Additional weights were added to the resistance force. What is the new total mass of the resistance force? (5 points) 21. What happens to the effort force? (5 points) 22. What mass would the effort force need to be in order to lift the resistance force? (5 points) 900 The effort force lifted up after 900 grams were put on the resistance force. 250

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