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A car travelling at 14.0 m/s approaches a traffic light. The driver applies the brakes and is able to come to halt in 5.6 s. Determine the average acceleration of the car during this time interval.

User Ivoszz
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1 Answer

7 votes

Answer:


a=2.5\ m/s^2

Step-by-step explanation:

Given that,

Initial speed of the car, u = 14 m/s

Finally, it comes to rest, v = 0

Time, t = 5.6 s

We need to find the average acceleration of the car during this time interval. We know that,


a=(v-u)/(t)\\\\a=(0-14)/(5.6)\\\\a=-2.5\ m/s^2

So, the acceleration of the car is
2.5\ m/s^2 in the opposite direction of motion.

User Chris Driver
by
8.7k points
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