I'm not sure trying to equate it to simply lifting a weight works - doesn't it depend on the angle as the higher it goes, the more weight the bar is taking?
Imagine you got it to 90 degrees - the bar would bear the whole weight and the hand would just be stabilising it
So a maths question for those more cleverer than me
If someone is doing a landmine exercise, if the bar is 20kgs and has one 20kg plate being picked up from the end, how much is being lifted?
Is it 40kgs? Or 30kg cause only half the bar is counted? Or only really 25kgs really? Is being attached to the ground negating some of the weight?