A car is moving along a straight road with a constant velocity of 20 m/s. The driver applies the brakes, and the car decelerates at a constant rate of \(4 \, \text{m/s}^2\). How much time will it take for the car to come to rest?
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When an object comes to rest, the final velocity is zero. Use the first equation of motion \( v = u + at \) to find the time taken for the object to stop.