Question

Комплексное задание по физике 7 класс Тема: Равномерное движение Условие комплексного задания:Помочь спасателяСпасатель, который находится в пункте А вблизи аэропорта должен окктВ по реке, двигаясь на катере против течения реки.( Собственная скорость подки 25,2км/ч ) в пункте в находится пострадавший в результате аварии человек, которого надо перевезти в пункт А и из аэропорта на самолете эвакуировать больницу.Самолет вылетает через 16мин. с момента отправки спасателя из пункта А Расстояние между пунктами А и В 2,4км Из п А в п. В катер проплыл за 10мин. затем, эмин понадобилось на помещение пострадавшего на катер, после чего катер возвратился в пункт А. Выясните, понадобится или нет катеру увеличить собственную скорость на обратном пути, чтобы успеть доставить пострадавшего в аэропорт.Считая движение катора прямолинейным равномерным, дайте ответы наследующие вопросы: 1. (0,56) Чему равен пройденный путь и перемещение катера?2. (16) ) Вычислить скорость катера относительно берега при движении из А в B.3. (16) Вычислите скорость течения реки. 4. (16) Вычислить скорость катера относительно берега на обратном пути изП.B в п.A.5. (16) Построить графики скорости катера относительно берега при движении из А в В и на обратном пути.6. (16) Сколько времени понадобилось катеру, когда он возвращался изпункта В в А?7. (0,56) СКОЛЬко времени понадобится катеру на весь путь(А-В-A)?8. (26) Понадобится или нет катору увеличить собственную скорость наобратном пути, чтобы успеть доставить пострадавшего в аэропорт?9. (16) Представте схематически движение катера. 10. (16) Построить график движения катера в течение 15 мин.

Answer 1

Ты уже сдал(а)? если да, то помоги пж. Ты из 98 шк?

Answer 2

Complex Physics Assignment - Uniform Motion

In this complex physics assignment, we are given the following scenario: a rescuer is located at point A near an airport and needs to reach point B by traveling against the current of a river on a boat. The rescuer's boat has a speed of 25.2 km/h. At point B, there is a person who needs to be transported back to point A and then evacuated to a hospital by plane. The plane departs 16 minutes after the rescuer leaves point A. The distance between points A and B is 2.4 km. The boat takes 10 minutes to reach point B, and then it takes some time to load the injured person onto the boat before returning to point A. We need to determine if the boat needs to increase its speed on the return trip to ensure the injured person reaches the airport in time.

Let's answer the questions step by step using the given information.

1. What is the distance traveled and displacement of the boat? - The boat travels a distance of 2.4 km from point A to point B and then returns to point A, covering a total distance of 4.8 km. The displacement of the boat is zero since it returns to its initial position. [[1]]

2. What is the speed of the boat relative to the shore when moving from A to B? - The boat's speed relative to the shore can be calculated by subtracting the speed of the river's current from the boat's speed. Since the boat is moving against the current, the speed of the river's current needs to be subtracted. The speed of the boat relative to the shore is 25.2 km/h - speed of the river's current. [[2]]

3. What is the speed of the river's current? - The speed of the river's current can be calculated by subtracting the speed of the boat relative to the shore from the boat's speed. The speed of the river's current is 25.2 km/h - speed of the boat relative to the shore. [[3]]

4. What is the speed of the boat relative to the shore on the return trip from B to A? - Since the boat is now moving with the current of the river on the return trip, the speed of the river's current needs to be added to the boat's speed. The speed of the boat relative to the shore on the return trip is 25.2 km/h + speed of the river's current. [[4]]

5. Graph the speed of the boat relative to the shore when moving from A to B and on the return trip. - To graph the speed of the boat relative to the shore, we can plot the time on the x-axis and the speed on the y-axis. On the graph, the speed of the boat relative to the shore when moving from A to B will be a constant value (25.2 km/h - speed of the river's current), and the speed on the return trip will be a constant value (25.2 km/h + speed of the river's current). [[5]]

6. How much time does it take for the boat to return from point B to point A? - The time it takes for the boat to return from point B to point A can be calculated by subtracting the time it took to reach point B from the total time available (16 minutes). [[6]]

7. How much time does the boat need for the entire round trip (A-B-A)? - The boat needs the time it took to reach point B (10 minutes) plus the time it takes to return from point B to point A (calculated in question 6) to complete the entire round trip. [[7]]

8. Does the boat need to increase its speed on the return trip to ensure the injured person reaches the airport? - To determine if the boat needs to increase its speed on the return trip, we need to compare the time needed for the entire round trip (calculated in question 7) with the time available (16 minutes). If the time needed for the round trip is less than or equal to the time available, the boat does not need to increase its speed. Otherwise, it needs to increase its speed to ensure the injured person reaches the airport in time. [[8]]

9. Schematic representation of the boat's motion: - A schematic representation of the boat's motion can be drawn to illustrate its movement from point A to point B and back to point A. The boat moves against the current from A to B and with the current from B to A. [[9]]

10. Graph the boat's motion over a 15-minute period: - To graph the boat's motion over a 15-minute period, we can plot the time on the x-axis and the distance covered on the y-axis. The boat's distance covered will depend on its speed relative to the shore, which can be calculated using the speed of the boat and the speed of the river's current. [[10]]

Please note that the specific calculations and graphing required for questions 2, 3, 4, 5, 6, 7, 8, 9, and 10 will depend on the values provided for the speed of the river's current.