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Question: A rocket of mass 1000 kg exhausts gases at a rate of 4 kg/sec with a velocity 3000 m/s. The thrust d...

A rocket of mass 1000 kg exhausts gases at a rate of 4 kg/sec with a velocity 3000 m/s. The thrust developed on the rocket is

A

12000 N

B

120 N

C

800 N

D

200 N

Answer

12000 N

Explanation

Solution

F=u(dmdt)=3000×4=12000 NF = u \left( \frac { d m } { d t } \right) = 3000 \times 4 = 12000 \mathrm {~N}