Question

A rocket has a mass of 100 kg. 90% of this is fuel. It ejects fuel vapors at the rate of 1 kg/sec with a velocity of 500 m/sec relative to the rocket. It is supposed that the rocket is outside the gravitational
field. The initial upthrust on the rocket when it just starts moving upwards is:
(A) Zero
(B) 500 N
(C) 1000 N
(D) 2000 N​

Answer 1

Answer:

Explanation:here is your ans