When you double the speed of your car, you increase its force of impact:
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Eight times.
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Three times.
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Four times.
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Six times.
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Explanation
The faster you drive, the greater the impact or striking power of your vehicle. If you double the speed of your vehicle, you increase its force of impact four times. When you triple the speed of your vehicle, you increase its force of impact nine times.
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This question appears in the following DMV practice tests: