Question

A rocket is going upward with acceleration motion. A man string in it feels his weight increased 5 time his own weight. If the mass of the rocket including that of the man is `1.0xx10^(4)kg` , how much force is being applied by rocket engine? `(Take g=10ms^(-2))` .
A. `5xx10^(4)N`
B. `5xx10^(5)N`
C. `5xx10^(8)N`
D. `2xx10^(4)N`

Answer 1

Correct Answer - B
As the weight of man increased by 5 times, so acceleration of the rocket, `a=5g=xx1050ms^(-2)`
Force applied by rocket engine is
`F=ma=1.0xx^(4)xx50=5xx10^(5)xx10^(5)N`