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A mass of 1 kg is suspended by means of a thread. The system is (i) lifted up with an acceleration of 4.9 ms$$-$$2. (ii) lowered with an acceleration of 4.9 ms$$-$$2. The ratio of tension in the first and second case is
A
3 : 1
B
1 : 2
C
1 : 3
D
2 : 1
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