Question When you double the speed of a car, you increase the potential force of impact by: Answers Two times. Three times. Four times. Nothing. Explanation The faster you drive, the greater the impact or striking power of your vehicle. When you double the speed of a car, you increase its force of impact by four times. Pass your DMV Written Test with flying colors Take me to the cheat sheet Florida This questions appears in the following tests: Florida Practice Test 9 Florida Practice Test 4