Introduction to the friction of mountain bike equipment:
1. Why is the mountain bike an Angang? In the mountain bike's front axle, the middle axle, the rear axle, the handlebar rotation, the ankle rotation, and other places, there are steel balls. People riding mountain bikes always want to be relaxed, flexible and labor-saving. The use of rolling instead of sliding can greatly reduce the friction. Therefore, to install the steel ball in the place where the mountain bike rotates, we can often add lubricating oil to make the contact surfaces away from each other, so that the friction can be made smaller.
2. Why do mountain bike tires have uneven patterns? The amount of friction is related to two factors: the size of the pressure and the roughness of the contact surface. The greater the pressure, the greater the friction; the rougher the contact surface, the greater the friction. The mountain bike tire has a concave and convex pattern, which increases the friction by increasing the roughness between the mountain bike and the ground. The purpose is to prevent the mountain bike from slipping.
3. Why can the mountain bike stop after the brakes? When braking, the friction between the brake shoe and the rim will hinder the rotation of the rear wheel. The greater the pressure on the hand, the greater the pressure on the rim of the brake shoe, the greater the friction generated, and the slower the rear wheel rotates. If it is completely braked, the friction between the rear wheel and the ground becomes the sliding friction (originally rolling friction, direction forward), and the direction is backward, which hinders the movement of the mountain bike, so it stops.