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Difficulty: MediumSpeed Control and Following Distance

When towing a heavy trailer or hauling a heavy load, a driver should maintain the standard three-second following distance because additional vehicle weight does not affect total stopping distance.

Answer: Answer

Answer

False. Increased vehicle mass increases momentum and braking distance, requiring drivers towing trailers or carrying heavy loads to increase their following distance beyond the standard three-second rule.
The statement is false because adding weight or towing a trailer increases a vehicle's kinetic energy, which extends total braking distance and necessitates a longer following distance.

Step-by-Step Solution

1
Analyze physical factors influencing vehicle stopping distance
Vehicle mass directly affects kinetic energy (Ek=12mv2E_k = \frac{1}{2}mv^2), meaning a heavier vehicle requires considerably more braking force and distance to come to a stop.
Greater mass increases momentum, extending both braking effort and total stopping distance.
2
Evaluate following distance rules under altered vehicle load conditions
The standard three-second rule serves as a baseline for light passenger vehicles in good conditions. When towing or carrying heavy loads, this distance must be expanded to four seconds or more.
Drivers must adjust following distance upward to compensate for increased stopping distance.

Key Concept

Impact of Vehicle Weight on Following Distance
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Topics

Speed Control and Following Distance

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