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Zorluk: KolayStopping Distance Components

A heavy commercial vehicle equipped with air brakes is traveling on a dry, level highway. Under specific operating conditions, the driver records a perception distance of 142 ft142\text{ ft}, a reaction distance of 61 ft61\text{ ft}, an air brake lag distance of 32 ft32\text{ ft}, and an effective braking distance of 216 ft216\text{ ft}. What is the total stopping distance, in feet, for this vehicle?

Cevap: 451 ft

Cevap

The total stopping distance is 451 ft451\text{ ft}.
For an air-brake-equipped commercial motor vehicle, total stopping distance comprises four distinct parts: perception distance (142 ft142\text{ ft}), reaction distance (61 ft61\text{ ft}), brake lag distance (32 ft32\text{ ft}), and braking distance (216 ft216\text{ ft}). Summing all four values yields 142+61+32+216=451 ft142 + 61 + 32 + 216 = 451\text{ ft}.

Adım Adım Çözüm

1
Identify the four sequential components that make up total stopping distance in an air-brake system.
Total Stopping Distance = Perception Distance + Reaction Distance + Brake Lag Distance + Braking Distance
Air brake systems introduce brake lag distance due to the mechanical time required for air to flow through the lines and actuate the brakes.
2
Calculate the linear sum of all four distance components.
142+61+32+216=451 ft142 + 61 + 32 + 216 = 451\text{ ft}
Each component represents consecutive forward travel before the vehicle comes to a complete halt.

Anahtar Kavram

Total stopping distance for commercial vehicles with air brakes equals the sum of perception distance, reaction distance, brake lag distance, and braking distance.
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Stopping Distance Components

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