Question

at a certain instant of time the mass of a rocket going up vertically close to the ground is 100 kg if it is ejecting 5 kg of gas per second at a speed of 400m/s the acceleration of the rocket would be

Answer 1

Answer: b =10 m/s^2

Explanation:

F(thrust) = v{relative)} * dm/dt

Ma = v* dm/dt

a= v/M *dm/dt

a= 400/100 X 5

a = 20 m/s^2

Net acceleration = a(up) - g (downward)

= 20-10 = 10