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17.Two weights w(1) and w(2) are connect...

17.Two weights `w_(1)` and `w_(2)` are connected by a light thread which passes over a light smooth pulley.If the pulley is raised with an acceleration equal to that due to gravity,then the tension in the thread will be
(1) `(2w_(1)w_(2))/(w_(1)+w_(2)),`
(2) `(4w_(1)w_(2))/(w_(1)+w_(2))`
(3) `(w_(1)w_(2))/(w_(1)+w_(2)),`
(4) `((w_(1)-w_(2))^2)/(w_(1)+w_(2))`

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