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Question

# If we suspend lamina at different positions, its center of gravity will still lie along the :

A
plumb line
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B
line of force
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C
line of weight
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D
gravity line
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Solution

## The correct option is A plumb linelet us assume body of mass m and divide it into many small particles. The centre of mass means it is the mean value of the all the small particles . it would more clear by assuming the body in 3-D coordinate system and calculate its mean of all small particles with the co ordinates in three dimension . where as the centre of gravity is also same but it is the mean of its weight. it is the point were total weight actswe may think both be same but not always. because in above example the value of g will be different at different positions because of that while calculating the mean the centre will shifts from centre of mass because suspension of the body at the different position the value of g value effects at some point so the centre of gravity will shifts but stays along blub line

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