Figure 2
A diagram of a locomotive with four wheelsets and force analysis. The locomotive is shown moving to the right with a velocity v. A force F is applied to the top left of the locomotive. The locomotive has four wheelsets labeled W1, W2, W3, and W4, each connected to the frame by springs. The distance between the wheelsets W1 and W2, and W3 and W4, is labeled as l. The distance between the wheelsets W2 and W3 is labeled as L. The height from the ground to the top of the locomotive is labeled as H, and the height from the ground to the axles of the wheelsets is labeled as h. The forces acting on the wheelsets are labeled as f1, f2, f3, and f4, with f1 and f2 acting upwards and f3 and f4 acting downwards. The weight W of the locomotive is shown acting downwards at the center.Locomotive with four wheelsets and force analysis. Source: Authors’ own work