Question

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. `1.75xx10^(5) N`
B. `3.5xx10^(5)N`
C. `7xx10^(5) N`
D. `14xx10^(5) N`

Answer 1

Correct Answer - C
( c) Initial thrust must be
`m(g+a)=3.5xx10^(4)(10+10)`
`=7xx10^(5)N`