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Center of Mass as an Average Point

Which is the ...

Question

Which is the reading of spring balance shown in figure?

A

50 k g

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B

100 k g

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C

75 k g

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D

Zero

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Solution

The correct option is B $100 k g$
On both the side the elongation spring will be same ;Kx=50g. So the total elongation will be 2x and the reading on spring balance will be 100 Kg

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