Stopping distance

你需要知道的

• Stopping distance is the thinking distance plus the braking distance.
• Thinking distance is how far the car travels during the driver's reaction time; braking distance is how far it travels once the brakes are on.
• The faster the car, the longer the stopping distance for the same braking force.
• At 30 mph a typical family car needs about 23 metres to stop, roughly six car lengths.

这个短片讲了

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