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If the force on a rocket moving with a v...

If the force on a rocket moving with a velocity of 300m/s is 345 N, then the rate of combustion of the fuel is

A

0.7 kg/s

B

1.4 kg/s

C

0.07 kg/s

D

10.7 kg/s

Text Solution

Verified by Experts

The correct Answer is:
A
`F= v(dm)/(dt) rArr 210 = 300 xx (dm)/(dt)`
`rArr (dm)/(dt) = (210)/(300) = 0.7 kg//sec`
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