Question

Средняя скорость тела за 20 с составила 4 м/с за первые 16 с тело двигались со скоростью 36км/ч. Чему равен путь пройдено й тело за всё время? Чему равна средняя скорость тело за оставшиеся 16с

Answer 1

Ответ:

Объяснение:

1. Средняя скорость

$v_{m}=\frac{v_{1} +v_{2} }{t}$

36 км/ч= 36/3,6 м/с = 10 м/с

Тогда

$4=\frac{10+x}{20}$  откуда

80=10+x и x=70 м/с; (Это и есть средняя скорость тела за 4 последние секунды)

Тогда, чтобы найти путь умножаем скорости на время

S=16*10+70*4=440 м

Answer 2

Calculation of Distance and Average Speed

To calculate the distance traveled by the body and its average speed, we need to use the given information.

Given: - The average speed of the body for the first 20 seconds is 4 m/s. - For the first 16 seconds, the body moved with a speed of 36 km/h.

To find the distance traveled by the body for the entire time and the average speed for the remaining 16 seconds, we can use the following steps:

1. Convert the speed of 36 km/h to m/s: - 1 km/h = 1000 m/3600 s - Therefore, 36 km/h = (36 * 1000) / 3600 m/s = 10 m/s.

2. Calculate the distance traveled for the first 16 seconds: - Distance = Speed * Time = 10 m/s * 16 s = 160 m.

3. Calculate the remaining time: - Remaining time = Total time - Time for the first 16 seconds = 20 s - 16 s = 4 s.

4. Calculate the average speed for the remaining 4 seconds: - Average speed = Total distance / Total time = Distance for the remaining 16 seconds / Remaining time.

Let's calculate the distance and average speed:

1. Distance traveled by the body for the entire time: - Distance = 160 m.

2. Average speed for the remaining 16 seconds: - Average speed = Distance for the remaining 16 seconds / Remaining time.

Now, let's calculate the average speed for the remaining 16 seconds:

Average speed for the remaining 16 seconds:

Using the formula: Average speed = Distance / Time

- Distance for the remaining 16 seconds = Distance for the entire time - Distance for the first 16 seconds = 160 m - 160 m = 0 m.

- Remaining time = 16 s.

Therefore, the average speed for the remaining 16 seconds is 0 m/s.

To summarize: - The distance traveled by the body for the entire time is 160 m. - The average speed for the remaining 16 seconds is 0 m/s.

Please note that the calculations are based on the given information and assumptions made.