一、传动问题用皮带等传动时,轮子边缘的线速度相等,同一转动物体上各点的角速度相等. 例1 (1992年全国高考题)如图1,为一皮带传送装置,右轮的半径为r,a是它边缘上的一点,左侧是一轮轴,大轮的半径为4r,小轮的半径为2r,b点在小轮上,它到小轮中心的距离为r,c点和d点分别位于小轮和大轮的边缘上.若在转动过程中皮带不打滑,则( ) (A)a点与b点的线速度大小相等 First, the transmission problem when using belts and other transmission, the line speed of the edge of the wheel is equal, the angular velocity of the same point on the same rotating object. Example 1 (1992 national college entrance examination questions) Figure 1, a belt conveyor device, the radius of the right wheel For r, a is a point on the edge of it. On the left side is a wheel axis, the radius of the big wheel is 4r, the radius of the small wheel is 2r, b is on the small wheel, and the distance from the center of the small wheel is r, c. And the d point is on the edge of the small wheel and the large wheel, respectively. If the belt does not slip during the rotation, the linear velocity of (a)a and b is the same.