Acar travelling at 15m/s comes to a rest in a distance of 14m when the brakes are applied. calculate the deceleration of the car
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Answer :

deceleration of the car is

Explanation:

It is given that,  

Initial speed of the car, u = 15 m/s

Final speed of the car, v = 0 (it comes to rest)

Distance covered by the car, d = 14 m

Let a is the acceleration of the car. We know that the rate of change of velocity of an object is called its acceleration. Mathematically, it can be calculated as :

So, the deceleration of the car is . Hence, this is the required solution.

it is the second option.

b.

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