If you double the speed of a car, the amount of kinetic energy in a crash:
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Triples.
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Quadruples.
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Doubles.
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Stays the same.
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Explanation
When drivers double the speed of their car, they increase its impact force, or kinetic energy, by four times. If they triple their speed, the kinetic energy increases nine times. By law, drivers aren't allowed to speed; they must obey the posted speed limit and adjust their speed according to weather, road, and traffic conditions. Driving at a safe speed reduces the likelihood and severity of crashes.
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Other questions in the same category: Collision Prevention and Response
Collisions can happen more often when one vehicle is traveling slower than the flow of traffic.Drivers have ________ to report a crash after it occurs.You must notify law enforcement and file a Report of Traffic Accident Occurring in California (SR 1) with DMV when:You are involved in a minor traffic collision that causes damage to an unattended vehicle, and you can't find the owner. You must:If you are involved in a traffic collision, you should:Collisions can happen more often when:If you are involved in a serious motor vehicle crash:When you are involved in an accident where the accident scene is not readily visible to oncoming traffic, you should:If you hit an unattended parked vehicle and cannot find the vehicle’s owner, you:Teen drivers are more likely to:
This question appears in the following DMV practice tests: