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Book 28, Question 31 · Video

Why do runners on a curved track start at staggered positions?

Video · 1:51 · Crafty Clover explains, from A Million Whys Book 28

On a 400-meter track, each lane is a little longer than the one inside it, because the curve is wider on the outside. If everyone started on the same line, the runners in the outer lanes would have to run farther. So in races with a curve, the outside runners start a few steps ahead. This is called a staggered start. When everyone finishes the same distance, the race is fair.

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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 do runners on a curved track start at staggered positions?

The Big Idea

At the start of some races, runners aren't lined up evenly! The outside runners start ahead. Is that fair? Yes!

Longer Lanes

Step one: Longer Lanes. On a 400-meter track, each lane is a little longer than the one inside it. That's because the curve is wider on the outside.

Same Line?

Step two: Same Line?. If everyone started on the same line, runners in the outer lanes would have to run farther. That wouldn't be fair at all.

Staggered

Step three: Staggered. In races with a curve, the outside runners start a few steps ahead, which is called a staggered start. When everyone runs the same distance, the race is fair.

A Closer Look

Let's take a closer look! Shortest. Longest. Makes the difference. Same distance.

Quick Facts

Quick facts! A lap in the inside lane of a standard track is 400 meters. Outer lanes are longer. Outside starts ahead. Everyone runs the same.

Think Like a Scientist

Now, think like a scientist! Draw one circle inside another. Lay string around the inner circle. Lay string around the outer circle. Which string is longer? How is this like track lanes?

Outro

On a curved track, outer lanes are longer than inner ones. So in races with a curve, outside runners start a few steps ahead in a staggered start. That way everyone runs the same distance. Science is amazing! What will you discover next? Every question is a new adventure, so keep wondering and keep exploring with me! 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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