(adsbygoogle = window.adsbygoogle || []).push({}); Stopping Distance + Reaction Time Problem ---> Physics beginner

1. The problem statement, all variables and given/known data

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.

2. Relevant equations

- V_{1}= V_{0}+ at

- D = V_{0}t + 1/2at^{2}

Where:

V_{1}= Final Speed

V_{0}= Initial Speed

A = Acceleration

T = Time

D = Distance

3. 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:

V_{1}= V_{0}+ at

0 = 22.22 - 8t

t = 2.7775 seconds

D = V_{0}t + 1/2at^{2}

D = 22.22 * 2.7775 - [(8 * 2.7775^{2})/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

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# Stopping Distance + Reaction Time Problem -> Physics beginner

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