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Book 28, Question 10 · Video

Why does a football fly in a spiral?

Video · 1:44 · Crafty Clover explains, from A Million Whys Book 28

When a quarterback throws with a spin, the ball spins around its long axis like a top. Spinning objects resist changes in direction, so the nose stays pointed along its path. Without spin, a football would tumble end over end and be hard to catch. A spiral also has less air drag, so it flies farther and straighter.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why does a football fly in a spiral?

The Big Idea

A perfect football pass spins like a bullet! It's called a spiral. Why does spin help?

Spinning

Step one: Spinning. When a quarterback throws with a spin, the ball spins around its long axis like a top. Spinning objects resist changes in direction.

Pointed Nose

Step two: Pointed Nose. The nose stays pointed along its path. Without spin, a football would tumble end over end and be hard to catch.

Less Drag

Step three: Less Drag. A spiral also has less air drag. So it flies farther and straighter.

A Closer Look

Let's take a closer look! Spin steadies it. Nose points ahead. Less drag. More accurate.

Quick Facts

Quick facts! A flying disc flies steadily for the same reason: it spins. Spin keeps it steady. No spin means tumbling. Spirals fly farther.

Think Like a Scientist

Now, think like a scientist! Roll up a pair of socks. Throw them with a spin. Throw them without a spin. Stay away from people and windows. Which flies straighter?

Outro

A football flies in a spiral because spinning around its long axis keeps the nose pointed along its path, like a top. Without spin, it would tumble. Spirals also have less drag, so they fly farther and straighter. Spin is the secret. Science is amazing! Keep asking questions! The more you look around, the more wonders you will find, so keep your eyes open! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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