Question

A 5000 kg rocket is set for vertical firing. The
exhaust speed is 800 ms⁻¹. To give an initial
upward acceleration of 20 ms⁻², the amount of
gas ejected per second to supply the needed
thrust will be (g = 10 ms⁻²)
(a) 127.5 kg s⁻¹ (b) 187.5 kg s⁻¹
(c) 185.5 kg s⁻¹ (d) 137.5 kg s⁻¹

Answer 1

Answer:

(b) is the correct answer.........