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A mass of 1kg attached to one end of a s...

A mass of 1kg attached to one end of a string is first lifted up with acceleration 4.9`m//s^2` and then lowered with same acceleration. What is the ratio of tension in string in two cases

Text Solution

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When mass is lifted up with acceleration
`4.9 m//s^(2) , T_(1) =m(9.8 + 4.9)`
When mass is lowered with same acceleration,
`T_(2) =m(9.8 - 4.9)`
`therefore T_(1)/T_(2) = 14.7/4.9 = 3:1`
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