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Book 20, Question 131 · Video

How Do Cog Railways and Funiculars Climb Slopes That Normal Trains Can’t?

Video · 1:52 · Crafty Clover explains, from A Million Whys Book 20

Cog railways and funiculars climb slopes that normal trains cannot. Normal train wheels would slip on a steep track, like boots on wet ice. So these railways use clever tricks to g

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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. How do cog railways and funiculars climb slopes that normal trains can’t?

The Big Idea

Cog railways and funiculars climb slopes that normal trains cannot. Normal train wheels would slip on a steep track, like boots on wet ice. So these railways use clever tricks to grip or pull, instead of just rolling.

Wheels Slip

Step one: normal wheels slip. A normal train depends on smooth wheels gripping smooth rails. On a very steep track, they would slide backward instead of climbing.

Cog Railway

Step two: a cog railway adds teeth. It has a toothed rail in the middle of the track. A gear on the train locks into it, like a bicycle chain on its sprocket.

Funicular

Step three: a funicular uses a cable. Two cars are connected by a cable, so one going down helps pull the other up. They can climb slopes many times steeper than normal trains.

A Closer Look

Let's take a closer look at steep railways! The train has a gear. It locks into a toothed rail. A funicular has two cars on one cable. One goes down while the other goes up, both at the same time.

Quick Facts

Quick facts! Some cog trains climb slopes steeper than most roads. Switzerland has some of the steepest cog railways in the world. Funiculars work a bit like a seesaw. Always ride with a grown-up, and stay seated.

Think Like a Scientist

Now, think like a scientist! Run a toy car with a gear along a comb. See how the teeth grip. Then try a smooth ruler and compare. Which one is better for steep slopes?

Outro

Gears help trains climb mountains. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this