Question

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​

Answer 1

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

Step-by-step explanation:

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