A crane uses 2 kW to raise a 100-kg box 20 metersHow much time does it take?

I'm not sure how to set this problem upAny help would be greatly appreciatedThank you :)

Copper! Better conductor of heatAlwayse use copper over aluminum when you can! Hope that answers your question :)

copper is the best heat conductor

I would go with copper.

We start using by defining mechanical Power: PWork/time What is the work here? We lift the box a given distanceWorkmgh Since we know the power of the crane, we can simply plug in the values and solve for t: tmgh/P This is only true if the crane has a constant power, which seems to be the case LeSmartOne