If force on a rocket having exhaust velocity of \( 300 \mathrm{~m} / \mathrm{sec} \) is \( 210 N...
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If force on a rocket having exhaust velocity of \( 300 \mathrm{~m} / \mathrm{sec} \) is \( 210 N \), then rate of combustion of the fuel is
[CBSE PMT 1999; MH CET 2003; Pb. PMT 2004]
(a) \( 0.7 \mathrm{~kg} / \mathrm{s} \)
(b) \( 1.4 \mathrm{~kg} / \mathrm{s} \)
(c) \( 0.07 \mathrm{~kg} / \mathrm{s} \)
(d) \( 10.7 \mathrm{~kg} / \mathrm{s} \)
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