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Grade: 12th pass
        
In question(see attachment)we have to find the value of F so the object has only translatory motion.And in its explanation it is given that the object will have only translatory motion only if F acts at CM.But why we should choose CM as axis why we don't choose any other axis.I have seen many question like this.So,please please clear my doubt.
20 days ago

Answers : (1)

Arun
16143 Points
							
It is a case of translation motion without rotation. The force should act at the centre of mass
 
Ycm = (m*2l) + (2m*l) /(m+2m) = 4l/3
 
 
Regards
Arun
20 days ago
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