Question

с какой скоростью двигался вагон m=60 тон,если на него подействовала 3000 Н ,и скорость за 20 секунд стали 15м/сек помогите пожалуйста!:)

Answer 1

Ответ:

14 м/с

Объяснение:

m=60000 кг    F=3000 H    t=20 c    v=15 м/с     vo=?

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vo=v - a*t=v - F*t/m=15 - 3000*20/60000=14 м/с

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Answer 2

Calculating the Speed of the Wagon

To calculate the speed of the wagon, we can use the formula:

Force = Mass x Acceleration

Given: - Mass (m) = 60 tons = 60000 kg - Force (F) = 3000 N - Time (t) = 20 seconds - Final velocity (v) = 15 m/s

First, we can calculate the acceleration using the formula:

Acceleration = (Final velocity - Initial velocity) / Time

Then, we can use the acceleration to find the initial velocity and the speed of the wagon.

Calculating Acceleration

Using the formula: Acceleration = (Final velocity - Initial velocity) / Time

We can rearrange the formula to solve for acceleration: Acceleration = (v - u) / t

Where: - v = Final velocity = 15 m/s - u = Initial velocity - t = Time = 20 seconds

Calculating Initial Velocity

We can rearrange the acceleration formula to solve for initial velocity: u = v - (a x t)

Where: - a = Acceleration - t = Time

Calculating Speed

Finally, we can calculate the speed of the wagon using the formula: Speed = Initial velocity + (Acceleration x Time)

Let's calculate the acceleration, initial velocity, and speed of the wagon using the given values.

Calculation

Acceleration: Acceleration = (15 m/s - u) / 20 s

Initial Velocity: u = 15 m/s - (a x 20 s)

Speed: Speed = u + (a x 20 s)

I hope this helps! Let's proceed with the calculations.