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Akimi4 [234]
3 years ago
11

A car is traveling at 20 meters/second and is brought to rest by applying brakes over a period of 4 seconds what is its average

acceleration over this time interval?
Physics
2 answers:
Fofino [41]3 years ago
7 0
Avg. acceleration = -5 m/s^2.
LuckyWell [14K]3 years ago
3 0

Answer:

Acceleration of the car is -5\ m/s^2

Explanation:

It is given that,

Initial speed of the car, u = 20 m/s

Finally, it brought to rest, v = 0

Time taken, t = 4 s

We need to find the average acceleration over this time interval. The acceleration of an object is given by following formula as :

a=\dfrac{v-u}{t}

a=\dfrac{-(20\ m/s)}{4\ s}          

a=-5\ m/s^2

So, the car is decelerating at 5\ m/s^2. Hence, this is the required solution.

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