Correct answer
No, they describe different stages.
No. Reaction distance is travelled from perceiving the hazard until starting to operate the brake; braking distance runs from beginning to brake until stopping. In this model their sum is stopping distance. At constant speed, reaction distance equals speed multiplied by reaction time: speed matters too. Fatigue and distraction can increase that time. Braking distance depends on factors including speed, grip, brakes and gradient. Numerically equal distances would still describe different concepts.
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Yes, both cover only the period before braking.
Yes, both begin after operating the brake.
No, they describe different stages.
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