Question

За какое время трактор с силой 75 кВт делает работу 540 мдж

Answer 1

N=75*10^3 Вт    A=540*10^6 Дж    t=?
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A=N*t
t=A/N=540*10^6/(75*10^3)=7200 c    (2 часа)
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Answer 2

Calculating Work Done by a Tractor

To calculate the time it takes for a tractor with a power of 75 kW to do 540 MJ of work, we can use the formula:

Work (in joules) = Power (in watts) × Time (in seconds)

First, we need to convert the power from kilowatts to watts: 75 kW = 75,000 watts

Now, we can rearrange the formula to solve for time: Time (in seconds) = Work (in joules) / Power (in watts)

Substitute the given values: Time (in seconds) = 540,000,000 joules / 75,000 watts

Let's calculate the time.