Question

A rocket is going upwards with accelerated motion. A man sitting in it feels his weight increased 5 times his own weight. It the mass of the rocket including that of the the man is $1.0 \times 10^{4}kg$, how much force is being applied by rocket engine? (Take g = $10ms^{- 2}$)

• A. $5 \times 10^{4}N$
• B. $5 \times 10^{5}N$
• C. $5 \times 10^{8}N$
• D. $2 \times 10^{4}N$

Answer 1

Answer: (B)

$5 \times 10^{5}N$

Answer 2

As the weight of man increased by 5 times , so acceleration of the rocket,

$a = 5g = 5 \times 10 = 50ms^{- 2}$

Force applied by rocket engine is

}{= 5 \times 10^{5}N}$$