Question

23 февраля воробей полетел из гнезда к кормушке. Дул ветер со скоростью 4 м/с. К кормушке воробей летел 3 минуты, а обратно в 2 раза дольше. Какова скорость воробья? Ответ дайте в метрах в секунду.

Answer 1

Ответ:

12м/с

Пошаговое объяснение:

Пусть скорость воробья равна V

Так как от кормушки воробей летел дольше, то значит, что он летел против ветра, т е его скорость была V-Vветра

Тогда к кормушке он летел со скоростью V+Vветра

Время движения от кормушки в 2 раза больше, значит оно равно 2t

Значит, t*(V+Vветра)=S, a 2t*(V-Vветра) =S

Приравниваем левые части

t*(V+Vветра) =2t*(V-Vветра)

Делим обе части на t

V+Vветра=2V-2Vветра

Переносим V и 2Vветра через равно, знаки меняются на противоположные

2Vветра+Vветра=2V-V

3Vветра=V

Подставляем

V=3*4м/с

V=12м/с

Answer 2

Problem Analysis

We are given the following information: - On February 23, a sparrow flew from its nest to a bird feeder. - The wind was blowing at a speed of 4 m/s. - The sparrow flew to the bird feeder in 3 minutes. - The sparrow took twice as long to fly back from the bird feeder to its nest.

We need to determine the speed of the sparrow in meters per second.

Solution

To find the speed of the sparrow, we can use the formula:

Speed = Distance / Time

Let's assume the distance from the nest to the bird feeder is d.

From the given information, we know that: - The sparrow flew to the bird feeder in 3 minutes. - The sparrow took twice as long to fly back from the bird feeder to its nest, which is 6 minutes.

We can calculate the speed of the sparrow using the following steps:

1. Convert the time taken to fly to the bird feeder and back to seconds. 2. Calculate the total time taken for the round trip. 3. Calculate the distance traveled by the sparrow. 4. Calculate the speed of the sparrow.

Let's calculate the speed of the sparrow step by step.

Step 1: Convert the time taken to seconds

The sparrow flew to the bird feeder in 3 minutes, which is equal to 3 * 60 = 180 seconds.

The sparrow flew back from the bird feeder to its nest in 6 minutes, which is equal to 6 * 60 = 360 seconds.

Step 2: Calculate the total time taken for the round trip

The total time taken for the round trip is the sum of the time taken to fly to the bird feeder and the time taken to fly back.

Total time = 180 seconds + 360 seconds = 540 seconds

Step 3: Calculate the distance traveled by the sparrow

To calculate the distance traveled by the sparrow, we need to know the relationship between distance, time, and speed.

Distance = Speed * Time

Since the sparrow flew to the bird feeder and back, the total distance traveled is 2 times the distance from the nest to the bird feeder.

Total distance = 2 * d

Step 4: Calculate the speed of the sparrow

Using the formula Speed = Distance / Time, we can calculate the speed of the sparrow.

Speed = (2 * d) / 540

Now, let's solve for the speed of the sparrow.

Calculation

Speed = (2 * d) / 540

We need to find the value of d to calculate the speed. Unfortunately, the given information does not provide the value of d. Without the value of d, we cannot calculate the speed of the sparrow.

Please provide the value of d (the distance from the nest to the bird feeder) so that we can calculate the speed of the sparrow in meters per second.