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 × 104 kg, how much force is being applied by rocket engine? (Take g =10 m s-2)

Question

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 × 104 kg, how much force is being applied by rocket engine? (Take g =10 m s-2) (A) 5×104 N (B) 5×105 N (C) 5×108 N (D) 2 ×104 N

Tardigrade Admin · Accepted Answer

As the weight of man increases by 5 times, so acceleration of the rocket, a=5 g =5×10 =50 m s-2 Force applied by rocket engine is F=ma =1.0×104×50 =5×105 N

Q. 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 $1.0 \times 1 0^{4} k g,$ how much force is being applied by rocket engine? (Take $g = 10 m s^{- 2}$ )

$5 \times 1 0^{4}$ $N$

$5 \times 1 0^{5}$ $N$

$5 \times 1 0^{8}$ $N$

$2 \times 1 0^{4}$ $N$

As the weight of man increases by 5 times, so acceleration of the rocket, $a = 5 g$ $= 5 \times 10$ $= 50 m s^{- 2}$ Force applied by rocket engine is
$F = ma$ $= 1.0 \times 1 0^{4} \times 50$ $= 5 \times 1 0^{5} N$

Q. 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 1.0×104kg, how much force is being applied by rocket engine? (Take g=10ms−2)

5×104 N

5×105 N

5×108 N

2×104 N