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The systems shown in are in equilibrium if the spring balance is calibrated in newtons, what does it record in each case? `(g=10m//s^(2))`

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`T=2xx10xxg=2xx10xx10=200N`
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Two block of mass 2kg are connected by a massless ideal spring of spring contant K=10N//m . The upper block is suspended from roof by a light string A . The system shown is in equilibrium. The string A is now cut, the acceleration of upper block just after the string A is cut will be (g=10m//s^(2) .

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ALLEN-NEWTONS LAWS OF MOTION-EXERCISE-III
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