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A rocket with a lift-off mass 3.5xx10^4 ...

A rocket with a lift-off mass `3.5xx10^4 kg` is blasted upwards with an initial acceleration of `10m//s^2`. Then the initial thrust of the blast is

A

`1.75 xx 10^(5) N`

B

`3.5 xx 10^(5) N`

C

`7.0 xx 10^(5)N`

D

`1. 40 xx 10^(5) N`

Text Solution

Verified by Experts

The correct Answer is:
C
from F.B.D of rocket,
F - m g =ma
`implies` F= m (g+a)
Hence initial thrust must be
`F = m [g + a] = 3.5 xx 10^(4) (10+10) = 7xx10^(5) N`
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