A 3000 kg rocket is fired. If the exhaust speed is 500 `ms^(-1)`, how much gas must be ejected per second to supply the thrust needed, (a) to overcome the weight of the rocket, (b) to give the rocket an initial acceleration of 19.6 `ms^(-2)`?

Options

A. 58.8 Kg/s , 176.4 Kg/s
B. 132.8 Kg/s , 82.5 Kg/s
C. 72.5 Kg/s , 138.2 Kg/s
D. 93.2 Kg/s , 185.6 Kg/s

Answer

A