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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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