Consider a large truck carrying a heavy load, such as steel beams. A significant

Question

Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. Assume, for example, that a 13,000-kg load sits on the flatbed of a 20,000-kg truck moving at 12.0 m/s. Assume the load is not tied down to the truck and has a coefficient of static friction of 0.550 with the truck bed. (a) Calculate the minimum stopping distance for which the load will not slide forward relative to the truck. (b) Is any piece of data unnecessary for the solution?

Explanation / Answer

friction force = 13000*9.8*0.55 = 70070

acceleration = foce/mass = 70070/13000 = 5.39

s = v^2/2a = 12^2/ 2*5.39 = 13.36

mass of truck is unnecessary

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