🔍 Key Concepts

• Relationship between work, force, and distance • How potential energy changes when lifting an object vertically • Using the object’s weight (in pounds) directly when working in ft-lb

💭 Think About

• What basic formula links potential energy gained to the weight of an object and the vertical distance it is raised? • If you lift a 1‑pound object by 1 foot, how many ft‑lb of energy is that, and how can you scale that up to 10 pounds and 10 feet? • Which choice matches the product of the object’s weight and the height it is raised?

✅ Before You Answer

• Be sure you are using weight in pounds, not mass, in the calculation. • Confirm that you are multiplying the correct two quantities to get units of ft‑lb. • After calculating, compare the size of your result: should it be closer to 10, 100, or 1000 ft‑lb based on the numbers given?