If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards,the acceleration of the lift is
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When acc. is downward, let tension be T. Therefore, tension in the string when the lift is accelerating upwards is 2T.
So when the lift is moving down. . . a = (T - mg)/m.
and when it is going up,. . . a= (2T-mg)/-m
= (mg - 2T)/m. .
Hope it works. . :-)
So when the lift is moving down. . . a = (T - mg)/m.
and when it is going up,. . . a= (2T-mg)/-m
= (mg - 2T)/m. .
Hope it works. . :-)
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