assuming your reaction time to be .650 seconds. If you are traveling 100.0 km/hr and your car has good enough brakes to bring you to rest in 6.00 seconds, how far will you travel coming to a complete stop?
How do I solve this. I am very confused. I keep getting 83.33 meters but the answer is supposed to be 101.5 meters.
**Remember to change the km/hr to m/s.
ThanksHelp with a physics problem?If your reaction time is .650 seconds, and you are traveling at 27.78 m/s, then in the time it takes for you to react, you will have already traveled 18.06 meters. So in adding the reaction distance to your already calculated stopping distance, you will have traveled a total of 101.5 meters.Help with a physics problem?Reaction time is the time it takes you to begin braking after you see the need to stop. Since your initial speed is 27.8 m/s and you are traveling at constant velocity dx = vxt = 27.8 m/s (.650 s) = 18.05 m. This is how far you travel before braking.
Then you apply the acceleration formula dx = 1/2(vf +vi)(t) = 83.4 m that you travel during negative acceleration.
Therefore 18.05m + 83.4 m = 101.5 m
