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An object of mass 5 kg is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of 10 N throughout the motion. The ratio of time of ascent to the time of descent will be equal to [Use g = 10 ms –2 ].

1. 1 : 1
2. 3 : 2
3. 2 : 3
4. 2 : 3

Correct answer: 3 : 2

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