0 votes 0 votes If two nodes are observed at a frequency of $1800$ $rpm$ during whirling of a simply supported long slender rotating shaft, the first critical speed of the shaft in $rpm$ is $200$ $450$ $600$ $900$ Applied Mechanics and Design gateme-2013 applied-mechanics-and-design machine-design shafts + – piyag476 asked Feb 19, 2017 • recategorized Mar 3, 2021 by Lakshman Bhaiya piyag476 1.4k points 4 55 68 answer See all 0 reply