Question

Автомашина, скорость которой равна 7 м/с, тормозит и через 10 секунд останавливается на красный свет светофора. Чему равна проекция ускорения на направление движения автомашины? Проекция ускорения на направление движения автомашины a= м/с2. Результат округли до сотых.

Answer 1

Какой клас у тебя? И на какой мове

Answer 2

Ответ:а=(v-v0) /t

a=(0-7) /6 так как при остоновке скорость стала равна нулю, изначально 7,а время 6 то А=1, 16.

Проекция ускорения на направления движения равна-1,16 так как в обратную сторону от движения

Объяснение:

Answer 3

Calculation of the Acceleration Projection

To calculate the projection of acceleration on the direction of motion of the car, we need to use the formula:

Acceleration Projection = Acceleration * cos(θ)

where: - Acceleration is the magnitude of the acceleration. - θ is the angle between the acceleration vector and the direction of motion of the car.

In this case, we are given the speed of the car, which is 7 m/s, and the time it takes to stop, which is 10 seconds. We can use this information to calculate the acceleration.

To calculate the acceleration, we can use the formula:

Acceleration = Change in Velocity / Time

Since the car is coming to a stop, the change in velocity is equal to the initial velocity (7 m/s) because the final velocity is 0 m/s. Therefore, the acceleration can be calculated as follows:

Acceleration = 7 m/s / 10 s = 0.7 m/s^2

Now that we have the acceleration, we can calculate the projection of acceleration on the direction of motion of the car. Since the car is coming to a stop, the direction of motion is opposite to the direction of acceleration. Therefore, the angle between the acceleration vector and the direction of motion is 180 degrees.

Using the formula mentioned earlier, we can calculate the projection of acceleration as follows:

Acceleration Projection = 0.7 m/s^2 * cos(180°)

The cosine of 180 degrees is -1, so the projection of acceleration is:

Acceleration Projection = 0.7 m/s^2 * (-1) = -0.7 m/s^2

Therefore, the projection of acceleration on the direction of motion of the car is -0.7 m/s^2.