Question

Автомобиль движется со скоростью 72 км в час Определите ускорение автомобиля если Через 20 минут он остановится

Answer 1

Calculation of Acceleration

To determine the acceleration of the car, we need to know the initial velocity, final velocity, and the time taken to come to a stop.

Given: - Initial velocity (u) = 72 km/h - Time taken (t) = 20 minutes

First, let's convert the initial velocity from km/h to m/s: - 1 km/h = 1000 m/3600 s - Therefore, 72 km/h = (72 * 1000) / 3600 = 20 m/s

Next, let's convert the time taken from minutes to seconds: - 1 minute = 60 seconds - Therefore, 20 minutes = 20 * 60 = 1200 seconds

Now, we can calculate the acceleration using the formula: - Acceleration (a) = (final velocity - initial velocity) / time taken

Since the car comes to a stop, the final velocity (v) is 0 m/s.

Substituting the values into the formula: - Acceleration (a) = (0 - 20) / 1200 = -0.0167 m/s^2

Therefore, the acceleration of the car is approximately -0.0167 m/s^2.