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Two construction cranes are used to lift identical 1200-kilogram loads of bricks the same vertical distance. The first crane lifts the bricks in 20. Seconds and the second crane lifts the bricks in 40. Seconds. Compared to the power developed by the first crane, the power developed by the second crane is.

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The power developed by the second crane is half that of the first crane.

Power

Power is the ratio of the amount of energy to the total time. It is given by:

Power = Energy / time

Energy = mass * g * h

Let g represent the acceleration due to gravity and h the vertical height, for the first crane:

Power = 1200gh/20

For the second crane:

Power = 1200gh/40

Ratio of power in second crane to that of first = (1200gh/40) / (1200gh/20) = 0.5

The power developed by the second crane is half that of the first crane.

Find out more on Power at: https://brainly.com/question/24898587

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