Question

CРОЧНО!Яку потужність розвиває підйомний кран ящо роботу 9 мегаджоулів він виконує за 5 хвилин?

Answer 1

A=9 МДж=9*10^6 Дж t=5м=300с решение P=A/t= 9*10^6/300= 3*10^4 Дж/с

Answer 2

Power Developed by the Crane

To calculate the power developed by the crane, we can use the formula:

Power (P) = Work done (W) / Time taken (t)

Given that the crane does work of 9 megajoules in 5 minutes, we can calculate the power developed by the crane using this formula.

Calculation

Using the formula P = W / t, where W = 9 megajoules and t = 5 minutes, we can convert the time to seconds for consistency in units.

1 minute = 60 seconds, so 5 minutes = 5 * 60 = 300 seconds.

Now, we can calculate the power: P = 9 megajoules / 300 seconds

Result

The power developed by the crane is 0.03 megawatts.