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inessss [21]
3 years ago
15

A weed eater does 21 kJ of work in 0.750 h. What power does it develop?

Physics
1 answer:
myrzilka [38]3 years ago
6 0

Answer:

p =  \frac{w}{t}

21kj÷0.750

28w

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Starting from the equation:

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First of all, let's multiply by t on both sides:

v\cdot t = \frac{x_f-x_i}{t}\cdot t \\vt = x_f - x_i

And then, let's divide by v on both sides:

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So, finally

t=\frac{x_f-x_i}{v}

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