As shown in the figure, two equal masses each of 2 \( \mathrm{kg} \...

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As shown in the figure, two equal masses each of 2 \( \mathrm{kg} \) are suspended from a spring balance. The reading
\( \mathrm{P} \) of the spring balance will be

W
(1) Zero
(2) \( 2 \mathrm{~kg} \)
(3) \( 4 \mathrm{~kg} \)
(4) Between zero and \( 2 \mathrm{~kg} \)
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