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22-01-2022
Physics

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A crane lifts a 450 kg concrete to the top of a 50m building in 5s. Assuming g=10m/s
A. The potential energy of the concrete
B. The the power developed by the crane

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22-01-2022

Answer:

A . pE=mgh 450kg*50m*10m/s^2=225000Joule

Explanation:

potential energy equals (mass) (gravity) (height)

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