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Difficulty: MediumFactors Affecting Braking Distance

When travelling down a steep gradient, a vehicle's braking distance will be significantly longer than when travelling on a level road at the same speed.

Answer: Answer

Answer

True
When driving downhill, the downward component of gravity acts in the same direction as the vehicle's motion. This adds momentum and counteracts the braking force, leading to a longer distance required to stop compared to level ground at the same speed.

Step-by-Step Solution

1
Identify the external physical forces acting on the vehicle while braking on a slope.
On a downward gradient, a component of gravitational force acts parallel to the slope in the forward direction of travel.
Determining all acting forces is required to evaluate their impact on the vehicle's deceleration.
2
Analyze how the downward component of gravity interacts with the braking system.
The brakes must dissipate both the kinetic energy of the vehicle and counteract the continuous gravitational pull down the slope, resulting in a lower net deceleration rate.
Net deceleration determines how rapidly the vehicle's speed drops to zero.
3
Compare the braking distance on a gradient to standard braking on flat ground.
Because deceleration is reduced on a downhill incline, the vehicle travels a greater distance before coming to a standstill than it would on a level surface at identical speed.
On flat ground, gravity acts entirely perpendicular to the road surface rather than accelerating the vehicle forward.

Key Concept

The effect of road gradient and gravitational force on vehicle braking distance
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Topics

Factors Affecting Braking Distance

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