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A 0.1 kg block suspended from a massless...

A 0.1 kg block suspended from a massless string is moved first vertically up with an acceleration of `5ms^(–2)` and then moved vertically down with an acceleration of `5ms^(–2)`. If `T_(1)` and `T_(2)` are the respective tensions in the two cases, then

A

`T_(2)gtT_(1)`

B

`T_(1) -T_(2) =1 N if g = 10ms^(-2)`

C

`T_(1)-T_(2)=1kgf`

D

`T_(1)-T_(2)=9.8N, if g = 9.8 ms^(-2)`

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