crain carries concrete = 610kg

distance carried vertically = 91m
time carried = 90 seconds

What is the kilo watt?
I'm not sure which formulas to use... anyone know the answers?

Power = (Work done)/(time required)

The work done is M g H = 610x9.8x91 = 544,000 J. (H is the change in height and gt is the acceleration of gravity). You should be familiar with that potential energy formula.

Divide that by 90 seconds for the power in Watts. Then convert to kilowatts.

To calculate the kilowatts, we can use the formula:

Power = Work done / Time

First, let's calculate the work done:

Work done = Mass x Gravity x Height

Given that the mass (M) is 610 kg, the acceleration due to gravity (g) is 9.8 m/s^2, and the height (H) is 91 m, we can plug in these values into the formula:

Work done = 610 kg x 9.8 m/s^2 x 91 m
= 544,000 joules

Now, let's calculate the power in watts:

Power = Work done / Time
= 544,000 joules / 90 seconds
= 6,044 watts

To convert watts to kilowatts, divide the power by 1000:

Power in kilowatts = 6,044 watts / 1000
= 6.044 kilowatts

So, the power of the crane carrying the concrete is approximately 6.044 kilowatts.