Question

Даю 50 баллов пожалуйста помогите срочно надо!!!! В течении 40 с троллейбус двигался со скоростью 75 км/ч, а потом 1 минуту со скоростью 85 км/ч. Какой путь прошёл троллейбус за всё время движения?

Answer 1

Ответ:

≈ 2,25 км

Объяснение:

v₁ = 75 км/ч ≈ 20,83 м/ч

t₁ = 40 c

v₂ = 85 км/ч ≈ 23,61 м/с

t₂ = 1 мин = 60 с

s - ?

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s₁ = v₁t₁ = 20,83 * 40 = 833,2 м

s₂ = v₂t₂ = 23,61 * 60 = 1416,6 м

s = s₁ + s₂ = 833,2 + 1416,6 = 2249,8 м ≈ 2,25 км

Answer 2

Calculation of the Distance Traveled by the Trolleybus

To calculate the distance traveled by the trolleybus, we need to consider the two different speeds at which it was moving and the time it spent at each speed.

Given: - Speed of the trolleybus for the first 40 seconds: 75 km/h - Speed of the trolleybus for the next 1 minute (60 seconds): 85 km/h

To find the distance traveled, we can use the formula:

Distance = Speed × Time

Let's calculate the distance traveled at each speed and then add them together to find the total distance.

1. Distance traveled at 75 km/h for 40 seconds: - Speed = 75 km/h - Time = 40 seconds

Using the formula, we can calculate the distance:

Distance1 = 75 km/h × (40 seconds / 3600 seconds/hour)

2. Distance traveled at 85 km/h for 1 minute (60 seconds): - Speed = 85 km/h - Time = 60 seconds

Using the formula, we can calculate the distance:

Distance2 = 85 km/h × (60 seconds / 3600 seconds/hour)

3. Total distance traveled: - Total distance = Distance1 + Distance2

Let's calculate the distances:

1. Distance traveled at 75 km/h for 40 seconds: - Speed = 75 km/h - Time = 40 seconds

Distance1 = 75 km/h × (40 seconds / 3600 seconds/hour)

Calculating the distance:

Distance1 = 0.833 km

2. Distance traveled at 85 km/h for 1 minute (60 seconds): - Speed = 85 km/h - Time = 60 seconds

Distance2 = 85 km/h × (60 seconds / 3600 seconds/hour)

Calculating the distance:

Distance2 = 1.417 km

3. Total distance traveled: - Total distance = Distance1 + Distance2

Total distance = 0.833 km + 1.417 km

Calculating the total distance:

Total distance = 2.25 km

Therefore, the trolleybus traveled a total distance of 2.25 kilometers during its entire journey.