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The force on a rocket moving with a velo...

The force on a rocket moving with a veloctiy 300 m/s is 210N. The rate of consumption of fuel of rocket is

A

`0.07 kg //s`

B

`1.4 kg //s`

C

`0.7 kg//s`

D

`10.7 kg //s`

Text Solution

Verified by Experts

The correct Answer is:
C
force `,F = (d )/(dt ) ` ( momentum ) `=(d)/(dt) (mv) = v((dm)/(dt))`
` therefore ` Rate of combustion , `(dm)/(dt) = (F)/(V ) = (210)/( 300) = 0.7 kg //s`
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