A car moving at a speed of 36 km / h stops when braking for 2 s. What is the acceleration of a car?
| December 23, 2020 | education
The solution to this problem:
In the figure, we will direct the X-axis in the direction of the vehicle. Let us denote its speed before the start of braking as V0, and its acceleration after turning on the brake as a. The time of movement of the car after turning on the brake until the moment of stopping is denoted by t
At the moment of stopping, V0 = 0.
Therefore, 0 = V0-at:
a = Vo / t = 36 km / h / 4s = 10 km / h / 4c = 2.5 m / s2.
Answer: a = 2.5 m / s2.
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