Where Does the Energy Go When Bike Brakes Stop You?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Where does the energy go when bike brakes stop you?

The Big Idea

When you squeeze bike brakes, you slow down quickly. But the moving energy does not just vanish. It turns into something else!

Pads Press

Step one: pads press. When you squeeze the brakes, rubber pads press on the wheel and make friction. That friction fights the spinning of the wheel.

Motion to Heat

Step two: motion to heat. The friction turns the bike's moving energy into heat. The brakes get warm, and the energy spreads out into the air.

Gone for Good

Step three: spread out. The energy is not destroyed, but you cannot use it again to pedal. Brakes on mountain bikes can get too hot to touch after a long downhill.

A Closer Look

Let's take a closer look! You squeeze the lever. The pads press the wheel. Friction makes heat. The heat drifts into the air.

Quick Facts

Quick facts! The faster you go, the more heat the brakes have to create to stop you. Long downhills can make brakes very hot. Never touch hot brakes after a ride. The heat spreads into the air and cannot be used again.

Think Like a Scientist

Now, think like a scientist! Rub a rubber eraser hard on paper for ten seconds. Feel the eraser and the paper with a fingertip. Notice any warmth. What is the warmth made from? Then tell a friend what you found out.

Outro

Bike brakes turn moving energy into heat through friction. Be careful, since brakes can get very hot! 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!