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Liquid fuel is burnt in a rocket and its...

Liquid fuel is burnt in a rocket and its exhaust gas is rejected from its tail at a velocity of `10km//s`. The force acting on the rocket is `2xx10^(4)N`. At what rate the liquid fuel is burnt?

A

1.5 kg/s

B

2 kg/s

C

2.5kg/s

D

3 kgs

Text Solution

Verified by Experts

The correct Answer is:
B
`F= v(dm)/(dt)`
`F= 2xx10^(4)N and v=10km//s=10xx10^(3) m//s`
`therefore (dm)/(dt)=(F)/(v)=(2xx10^(4))/(10xx10^(3))= 2kg//s`
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