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A rocket of mass 4000 kg is set for vert...

A rocket of mass 4000 kg is set for vertical firing. How much gas must be ejected per second so that the rocket may have initial upwards acceleration of magnitude `19.6 m//s^(2)` ? [Exhaust speed of fuel`=980 m//s`]

A

`240 kgs^(-1)`

B

`60kgs^(-1)`

C

`120 kgs^(-1)`

D

None

Text Solution

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The correct Answer is:
C
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