A crane lifts a steel beam to a height of . If the task is accomplished in , what was the average power provided by the crane?
A crane is being used to lift a crate to a height of above the ground. If the crane's engine can provide a power output of , how long does it take for the crane to complete the task?
steel beam to a height of 
. If the task is accomplished in 
, what was the average power provided by the crane?
crate to a height of 
above the ground. If the crane's engine can provide a power output of 
, how long does it take for the crane to complete the task?