a construction crane lifts a prestressed concrete beam weighing 2 tons from the ground to the top of piers that are 18 ft above the groundDetermine the amount of work done considering (a) the beam and (b) the crane as the systemexpress your answers in both lbsft and Btu
This dream means that sometimes you need to make decisions on your ownAs you can see you weren't with your parentsSo start to become a little more independent and this dream will stop
It means the owner of the crack house only wanted to meet with youMaybe he thought your parents were undercover cops or somethingTo be honest it does seem like it means you should rely on your parents, but there comes a ptwhere u must make your own decisionAnd nobody(family included) can be there when the time comes to make certain decisions.
work is equivalent to energy spent on system (or gained from)to raise 2ton load to 18 ft (5.5m) elevation you need to spend energy Emgh2000kg9.81m/s^25.5m W108000J108kJ
