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Lift Lift also acts on a basketball. When you’re playing the game, the ball is surrounded by air. The air pressure below the ball pushes up harder than the air above the ball is pushing down. This is because air pressure increases with depth, so the air pressures are different at the top and bottom of the ball. The pressure differential creates upward buoyancy known as lift. You’ve likely seen or heard this concept demonstrated in fluid rather than air. It is known as Archimedes’ principle. Simply put, the magnitude of this buoyant force equals the weight of the fluid (air, in this example) that is displaced by the object (the basketball). In other words, the upward buoyant force (lift) exerted the weight of the air that is displaced by the ball. The basketball experiences an upward lift of about 1.5 percent of its weight, so it feels lighter because the air around the ball lifts it up. This video makes Archimedes’ principle simple to understand. KEY ICONS TO LOOK FOR: on the ball in the fluid (air) equals

Words To Understand: These words with their easy-to-understan he reader’s un erstanding of the ext while building vocabulary

Sidebars: This boxed material within the main text allows reader gain insights, explore possibilities, and broaden their perspective additional information to provide realistic and holistic perspectiv Educational Videos: Readers can view videos by scanning our Q with additional educational content to supplement the text. Exa coverage, moments in history, speeches, iconic sports moments,

Text-Dependent Questions: These questions send the reader ba careful attention to the evidence presented there.

Research Projects: Readers are pointed toward areas of further i chapter. Suggestions are provided for projects that encourage de

Series Glossary Of Key Terms: This back-of-the-book glossary c used throughout this series. Words found here increase the reade comprehend higher-level books and articles in this field.

CHAPTER 1 : FORCES THAT ACT ON A BASKETBALL

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