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 14,000-kg load sits on the flatbed of a 20,000-kg truck moving at 11.0 m/s. Assume the load is not tied down to the truck and has a coefficient of static friction of 0.600 with the truck bed.

(a) Calculate the minimum stopping distance for which the load will not slide forward relative to the truck.
m

Explanation / Answer

The load will not slide if the retarding force = force of friction

ma = mg

a= g = 0.6(9.8) = 5.88 m/s^2 apprx

using the kinr=nemataic equation,

v^2- u^2 = 2as'

0 - 11^2= 2(5.88)(s)

s( minimum stopping distance) = 10.289n m apprx

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