When a vehicle's speed doubles ( for example, from 20 mph to 40 mph), the distance needed to stop the vehicle increases by 4 times.
Firstly, there are various factors that can affect your breaking distance. Breaking distance can be defined as the measurement of how far your vehicle travels during the time it comes to complete stop once after hitting the breaks.
Now, as we know the faster an object moves, the longer the distance it will take to stop. Hence when we say that the speed of the vehicle will doubles, it will need about 4 times the distance to stop. If we talk in the similar context, we can also say that if it is given that vehicle's speed triples, then it will need up to 9 times the distance to stop.
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