A small pulley can drive a large pulley faster or slower
The small pulley drives the large pulley and lowers the speed. Conversely, the effect is reversed.
A small pulley drives a large pulley and slows down The belt drive is the same linear speed with different rotation radius and the different principle of angular velocity (wheel speed) The same linear velocity, the larger the radius, the smaller the angular velocity. V = w * r V stands for tangent line velocity, if the unit is m/s meters per second, w is for angular velocity, the unit is usually deg/s per second, r is the radius of rotation
In fact, in math and physics, you view the linear speed of the driving wheel outside the wheel as constant. So this problem becomes a circle diameter problem. The circumference of the big wheel must be greater than the small circle. In the belt drive, the small circle drives the big circle, and the circumference of the small circle will not reach the circumference of the big circle. And vice versa. Above, the proper way out of the mathematical formula is to understand, qualitatively.
