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

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$5 \times 10^{5} N$

$5 \times 10^{8} N$

$2 \times 10^{4} N$

$5 \times 10^{4} N$

answer is .

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Detailed Solution

As the weight of man increased by 5 times, so acceleration of the rocket, a = 5g = $5 \times 10 = 50 m s^{- 2}$

Force applied by rocket engine is

F = ma = $1.0 \times 10^{4} \times 50 = 5 \times 10^{5} N$

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