A crane is designed for a maximum lifting capacity of 600kg.A test reveals that its hook covers a vertical height of 12m within 18 seconds.a) Calculate the maximum power P.b)The crane has an efficiency of 0.88.If it was supplied with an output power of 240w.What is its output?
a) (600 x g x 12m) 70,560 Joules work (9.8 used as g)(70,560/18s) 3,920Wb) you screwed up input and output, I guessIf the 240Wis input, the output will be (0.88 x 240) 211.2WIf the 240Wis output, the input will be (240/0.88) 272.73W.
1No need to be secured, the ladder inside the crane tower has many platformsIt's actually a heap of ladders and platforms not a single ladderUsually the ladder is surrounded by a cage that would catch you if you fellOnce at the top there are handrails everywhere, you just make your way to the cabin2Average here in Australia is about 1500 to 2000 non union and 2500 to 3000 union3Not worried climbing but if there is a thunderstorm and you are in the cabin it can be scary 4You shouldn't climb the crane when it's rainy as its all steel it is slippery if wet but sometimes it cannot be helpedYou should wear non slip boots too
