Question

Самолет летел 30 минут со скоростью 450км/ч, затем 200 км со скоростью 500 км/ч. Определите: а)пройденный путь;б)Среднюю скорость;с) Постройте график движения (зависимость пути от времени) для данного телаЗаранее огромное спасибо !

Answer 1

30 минут= 0,5 часа. А) путь равен S=450*0,5+200=425 км. Б) Vср=(S1+S2)/(t1+t2)=425/(0,5+200/500)=425/0,9=472,22 км/ч.

Answer 2

#### Given Information: - The plane flew for 30 minutes at a speed of 450 km/h. - Then it flew for 200 km at a speed of 500 km/h. #### a) Пройденный путь (Distance Traveled): To calculate the distance traveled, we need to find the sum of the distances covered during the two segments of the flight. Distance covered in the first segment: - Time = 30 minutes = 0.5 hours - Speed = 450 km/h - Distance = Speed × Time = 450 km/h × 0.5 h = 225 km Distance covered in the second segment: - Distance = 200 km Total distance traveled: - Total Distance = Distance in the first segment + Distance in the second segment = 225 km + 200 km = 425 km **The plane has traveled a distance of 425 km.** #### б) Средняя скорость (Average Speed): To calculate the average speed, we need to find the total time taken for the entire journey and divide it by the total distance traveled. Total time taken: - Time in the first segment = 30 minutes = 0.5 hours - Time in the second segment = Distance ÷ Speed = 200 km ÷ 500 km/h = 0.4 hours - Total Time = Time in the first segment + Time in the second segment = 0.5 hours + 0.4 hours = 0.9 hours Average speed: - Average Speed = Total Distance ÷ Total Time = 425 km ÷ 0.9 hours ≈ 472.22 km/h **The average speed of the plane is approximately 472.22 km/h.** #### с) Постройте график движения (зависимость пути от времени) для данного тела (Plotting the Distance-Time Graph): To plot the distance-time graph, we can represent the two segments of the flight separately. Segment 1: - Time: 0 to 0.5 hours - Distance: 0 to 225 km (at a constant speed of 450 km/h) Segment 2: - Time: 0.5 to 0.9 hours - Distance: 225 km to 425 km (at a constant speed of 500 km/h) Here is a visual representation of the distance-time graph: ``` | Segment 1 | Segment 2 | Distance |-----------------------|-----------------------| 0 0.5 0.9 Time | hours hours ``` Please note that the graph is a rough representation and not to scale. I hope this helps! Let me know if you have any further questions.