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wlad13 [49]
3 years ago
12

Una grúa efectúa un trabajo de 45000 joules en 0.1

Physics
1 answer:
Hunter-Best [27]3 years ago
3 0

Answer:

<em>P = 7.5 KW</em>

<em>P = 7500 W</em>

Explanation:

<u>Potencia Mecánica</u>

Es una medida del trabajo realizado por un agente por unidad de tiempo.

Siendo W el trabajo mecánico y t el tiempo necesario para realizarlo, entonces la potencia viene dada por:

\displaystyle P=\frac{W}{t}

La unidad SI de la potencia es el vatio (W). Otra unidad muy común es el kilovatio (KW). 1 KW = 1000 W.

La grúa realiza un trabajo W=45000 Joules en un tiempo de t=0.1 minutos.

Para calcular la potencia en vatios, es necesario llevar el tiempo a segundos:

t = 0.1 min *60 = 6 segundos.

La potencia se calculará ahora:

\displaystyle P=\frac{45000}{6}

P = 7500 W

En kilovatios:

P = 7500 / 1000 = 7.5 KW

P = 7.5 KW

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Explanation:

Không biết V bạn kí hiệu ở đây là gì nhỉ? Có phải là điện thế?

Điện thế tại 1 điểm trong điện trường được định nghĩa là công làm vật dịch chuyển từ vị trí đó đến vô cùng. V = A/q

Chứng minh thì được, nhưng chỉ e bạn không có hiểu biết về nguyên hàm, tích phân nên không hiểu.

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Điện tích q dịch chuyển 1 khoảng dx rất nhỏ. Khi đó công do lực điện trường gây ra là:

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