Physics

Problem

The initial mass of a rocket is 1000 kg. Calculate at what rate the fuel should be burnt so that the rocket is given an acceleration of

20 \text{ ms}^{-2}

. The gases come out at a relative speed of

500 \text{ ms}^{-1}

with respect to the rocket. [Use

g = 10 \text{ m/s}^2

] [Main Aug. 26, 2021 (I)] (a)

6.0 \times 10^2 \text{ kg s}^{-1}

(b)

500 \text{ kg s}^{-1}

(c)

10 \text{ kg s}^{-1}

(d)

60 \text{ kg s}^{-1}