Question

Дам 15 баллов Выясни, сколько времени длилось торможение автомобиля до полной остановки, если его начальная скорость была равна 66 км/ч, а ускорение при торможении — 6 м/с2. Ответ (округли до десятых): t ~

Answer 1

Ответ:

4,1,s

Объяснение:

. ...................

Answer 2

Calculation of Stopping Time for a Car

To calculate the time it takes for a car to come to a complete stop, we can use the equation of motion:

v = u + at

Where: - v is the final velocity (which is 0 in this case, as the car comes to a stop) - u is the initial velocity (given as 66 km/h) - a is the acceleration (given as -6 m/s^2, negative because it is deceleration) - t is the time we want to find

Rearranging the equation, we have:

t = (v - u) / a

Substituting the given values:

t = (0 - 66 km/h) / (-6 m/s^2)

To calculate the time in seconds, we need to convert the initial velocity from km/h to m/s:

66 km/h = 66 * (1000 m / 3600 s) = 18.33 m/s

Substituting this value into the equation:

t = (0 - 18.33 m/s) / (-6 m/s^2)

Calculating the result:

t ≈ 3.05 seconds

Therefore, it takes approximately 3.05 seconds for the car to come to a complete stop.