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A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5 m//s^(2), the reading of the spring balance will be : |
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Answer» 49 N When the lift is STATIONARY, then `49 = m xx 9.8` or `m= 5 KG` Hence `R = 5(9.8 - 5) = 24 N` Hence choice is (b). |
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