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A 5000 kg rocket is set for vertical fir...

A 5000 kg rocket is set for vertical firing. The exhaust speed is `800 ms^(-1)`.To give an intial upward acceleration of 20 `m//s^(2)` , the amount of gas ejected per second to supply the needed thrust will be (`g=10ms^(-2)`)

A

127.5 kg/s

B

137.5 kg/s

C

185.5 kg/s

D

187.5 kg/s

Text Solution

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The correct Answer is:
D
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