A customer requires cable to lower loaded wagons down a slope, the configuration is shown in Figure 1. The cable will be attached to a rope brake to keep the wagons under control. During a site visit, you note that the slope is 35m long and has an angle of 5.71° with the ground and the wagon speed is 3.5m/s at the end of the incline. You are told that the total mass of the wagons will not exceed 50 tonnes and that the resistance to motion is 132N/tonne. Calculate the minimum load that the cable supplied should be able to withstand (ignoring any regulations about safety factors, for now, assume the wagon is stationary at t=0). You may find the following formula helpful:
v^2=u^2+2aS
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