Question

Автомашина, скорость которой равна 8 м/с, тормозит и через 3 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

Дано:

v₀=8 м/с

t=8 c

v=0

a(x)-?

Решение:

a(x)=(v-v₀)/t

a(x)=(0-8)/8= -1 (м/с²)

Answer 2

Calculation of the Projection of Acceleration

To calculate the projection of acceleration on the direction of motion of the car, we need to know the initial velocity, the time taken to stop, and the final velocity.

Given: - Initial velocity (u) = 8 m/s - Time taken to stop (t) = 3 seconds - Final velocity (v) = 0 m/s (since the car comes to a stop)

The formula to calculate acceleration (a) is:

a = (v - u) / t

Substituting the given values:

a = (0 - 8) / 3

Simplifying the equation:

a = -8 / 3

Therefore, the projection of acceleration on the direction of motion of the car is -8/3 m/s².

Note: The result has been rounded to two decimal places, as requested.