Question

In a rocket of mass 1000 kg fuel is consumed at a rate of 40 kg/s. The velocity of the gases ejected from the rocket is $5 \times 10 ^ { 4 } \mathrm {~m} / \mathrm { s }$. The thrust on the rocket is

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

Answer 2

Thrust on the rocket $F = \frac { u d m } { d t }$ $= 5 \times 10 ^ { 4 } ( 40 )$