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julia-pushkina [17]
3 years ago
7

an automobile is traveling 65km/h the brakes decelerate it at a rate of -6.0 m/s^2 how long will it take to stop the car?

Physics
1 answer:
joja [24]3 years ago
6 0

Explanation:

It is given that,

Initial speed of the automobile, u = 65 km/hr =

Final speed of the automobile, v = 0

Deceleration of the automobile, a=-6\ m/s^2

We need to find the distance covered by the car as it comes to rest. It can be calculated using third equation of motion as :

v^2-u^2=2ax

a=\dfrac{v^2-u^2}{2x}

a=\dfrac{0-(18.05)^2}{2\times (-6)}

a=27.15\ m/s^2

So, the acceleration of the car is 27.15\ m/s^2. Hence, this is the required solution.

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As it is known that 1000 m =1 km and 1 km = 0.621 miles. So first we have to convert miles to km and then to metre as follows.

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