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Physics - proving the stopping distance of a car
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[QUOTE="totomyl, post: 5453746, member: 591952"] [h2]Homework Statement [/h2] an accident occurs up ahead on the highway. a driver traveling at 120km/h [e] reacts in 0.20s and applies the brakes causing an acceleration of 8.0m/s2 [w]. show that the stopping distance is 76 m. what am i doing wrong? i changed the acceleration to match the directions, so i made it negative. but i am not getting the right answer. [h2]Homework Equations[/h2] d = vi * t + 0.5(a * t^2) [h2]The Attempt at a Solution[/h2] i attempted this by using: d = (120km/h / 3.6[e])(0.20s) + 0.5(-8.0m/s[e] * 0.20s^2) d = 6.5m? [/QUOTE]
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Physics - proving the stopping distance of a car
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