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MyFinalRegret
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Stopping Distance + Reaction Time Problem ---> Physics beginner
A car is traveling at 80km/h, and brakes with a reaction time of .5 seconds. The car decelerates at 8m/s/s, determine the stopping distance of the car.
- V1 = V0 + at
- D = V0t + 1/2at2
Where:
V1 = Final Speed
V0 = Initial Speed
A = Acceleration
T = Time
D = Distance
Distance Traveled before Braking:
80km/h = 22.22m/s
0.5 * 22.22m/s = 11.11 m
Distance After Reaction:
V1 = V0 + at
0 = 22.22 - 8t
t = 2.7775 seconds
D = V0t + 1/2at2
D = 22.22 * 2.7775 - [(8 * 2.77752)/2]
D = 30.86m
Total Stopping Distance = 11.11m + 30.86m
= 41.97 m
Notes
I am only beginning to learn some basic concepts of physics in class, so I'm not entirely sure about the equations.
My teacher has provided no answer sheet to the question, and I am finding it hard to grasp the method of solving the question without a step by step example from a similar question.
I'd greatly appreciate it if anyone could let me know if I am right, or how to do it if I am wrong.
Thanks :D
Homework Statement
A car is traveling at 80km/h, and brakes with a reaction time of .5 seconds. The car decelerates at 8m/s/s, determine the stopping distance of the car.
Homework Equations
- V1 = V0 + at
- D = V0t + 1/2at2
Where:
V1 = Final Speed
V0 = Initial Speed
A = Acceleration
T = Time
D = Distance
The Attempt at a Solution
Distance Traveled before Braking:
80km/h = 22.22m/s
0.5 * 22.22m/s = 11.11 m
Distance After Reaction:
V1 = V0 + at
0 = 22.22 - 8t
t = 2.7775 seconds
D = V0t + 1/2at2
D = 22.22 * 2.7775 - [(8 * 2.77752)/2]
D = 30.86m
Total Stopping Distance = 11.11m + 30.86m
= 41.97 m
Notes
I am only beginning to learn some basic concepts of physics in class, so I'm not entirely sure about the equations.
My teacher has provided no answer sheet to the question, and I am finding it hard to grasp the method of solving the question without a step by step example from a similar question.
I'd greatly appreciate it if anyone could let me know if I am right, or how to do it if I am wrong.
Thanks :D