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A string tied on a roof can bear a maxim...

A string tied on a roof can bear a maximum tension of 50 kg wt. The minimum acceleration that can be acquired by a man of 98 kg to descend will be [Take `g=9.8 m//s^(2)`]

A

`9.8 m//s^(2)`

B

`4.9 m//s^(2)`

C

`4.8 m//s^(2)`

D

`5 m//s^(2)`

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