Two blocks of mass 10kg and 30kg are placed along a vertical line. The first block is raised through a height of 7cm.By what distance should the second mass be moved to raise the center of mass by 1cm?
A
2cm upward
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B
1cm upward
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C
2cm downward
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D
1cm downward
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Solution
The correct option is D1cm downward Center of mass=(m1y1+m2y2)(m1+m2)