Today’s motorcycles and cars are equipped with a very efficient braking system. They are so efficient that your vehicle stops safely, within a fraction of a second, in the case of an emergency. You pull the brake lever, the brake fluid, near to the lever gets compressed. Via a brake line this compressed fluid is directly connected to the brake pad, so the brake pads are activated. This braking system that you just saw was developed over the last five decades of research and practical experiences. Let’s learn how engineers developed such an efficient braking system, or more specifically, let’s learn the interesting physics behind disc brakes.
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tecno4
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La destrucción del disco del freno de este Ford Fiesta de 1990, «en nombre de la ciencia», por supuesto, se debe al calor que produce la fricción entre las pastillas de freno y el disco. Aunque es normal ver discos de freno al rojo vivo, por ejemplo en las carreras de Formula 1, en esta ocasión esa fricción se lleva al extremo pisando el pedal del freno del vehículo a la vez que se acelera el motor. 
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Today’s motorcycles and cars are equipped with a very efficient braking system. They are so efficient that your vehicle stops safely, within a fraction of a second, in the case of an emergency. You pull the brake lever, the brake fluid, near to the lever travels all the way down through the brake pipes, and the brake pads are activated. This braking system that you just saw was developed over the last five decades of research and practical experiences. Let’s learn how engineers developed such an efficient braking system, or more specifically, let’s learn the interesting physics behind disc brakes.
Scoop.it!
Algunos de los frenos de disco de bicicleta son tan eficientes que soportan frenadas a velocidades extremas. Eso sí:generan tal recalentamiento en los materiales que acaban poniéndose al rojo vivo y soltando llamas. En el vídeo, a partir de 02:30. Eso sí: conducir una bicicleta a esa velocidad es algo «extremo»: según se puede ver en el vídeo se producen humo y llamas cuando el freno actúa un rato a 800 revoluciones por minuto. Para la circunferencia de una rueda de 26" eso equivaldría a recorrer unos 1.736 metros por minuto, es decir: 104 kilómetros por hora.
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