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QID - 25049

With a given load on the cargo hook, the thrust on a cargo boom __________.

is greatest at an angle of 45° and decreases as the boom is raised or lowered 
            
increases as the angle to the horizontal increases 
            
is least at an angle of 45° and increases as the boom is raised or lowered 
            
increases as the angle to the horizontal decreases 
            

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