A 2000 kg rocket in free space expels 0....

A 2000 kg rocket in free space expels 0.5 kg of gas per second at exhaust velocity `"400 m s"^(-1)` for 5 s. The increase in the speed of the rocket in this time is

`2000 ms^(-1)`

`200 ms^(-1)`

`0.5ms^(-1)`

zero

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NTA MOCK TESTS-NTA NEET SET 38-PHYSICS

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