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Reading shown in two spring balances S(1...

Reading shown in two spring balances `S_(1)` and `S_(2)` is 90kg and 30kg respectively and lft is accelerating upwards with acceleration `10m//s^(2).S_(1)` in elongated and `S_(2)` is compressed. The mass is stationary with respect to life. Then the mass of the block will be

A

60kg

B

30kg

C

120kg

D

None of these

Text Solution

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The correct Answer is:
a
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