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Alisiya [41]
3 years ago
7

How much power is used in a machine that produces 15 Joules of work in 3 seconds? Use the formula P = W/t.

Physics
1 answer:
Marta_Voda [28]3 years ago
7 0
P=w/t


w=15
t=3
therefore, 5 watts (b)
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Answer:

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a)

La aceleración angular se define como:

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b)

El desplazamiento angular puede ser calculado usando la siguiente ecuación:

\theta=\theta_{i}+\omega_{i}t+\frac{1}{2}\alpha t^{2}

Aqui el angulo inicial es 0, por lo tanto.

\theta=20(5)+\frac{1}{2}(2)(5)^{2}

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El engranaje gira 125 radianes.

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Lo que debemos hacer aquí es convertir radianes a revoluciones.

Recordemos que 2π rad = 1 rev

Entonces:

\theta=125\: rad \times \frac{1\: rev}{2\pi\: rad}=19.89\: rev

Por lo tanto el engranaje hara aproximadamente 20 revoluciones.

Espero te haya sido de ayuda!

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