In a rocket of mass 1000 kg , fuel is consumed at a rate of 40 kg s -1. The velocity of gases ejected from rocket is 5 × 104 m s -1. The thrust on the rocket is

Question

In a rocket of mass 1000 kg , fuel is consumed at a rate of 40 kg s -1. The velocity of gases ejected from rocket is 5 × 104 m s -1. The thrust on the rocket is (A) 2 × 103 N (B) 2 × 104 N (C) 2 × 106 N (D) 2 × 108 N

Tardigrade Admin · Accepted Answer

Thrust, F=u((d m/d t))=5 × 104 × 40=2 × 106 N

Q. In a rocket of mass $1000 k g,$ fuel is consumed at a rate of $40 k g s^{- 1}$ . The velocity of gases ejected from rocket is $5 \times 1 0^{4} m s^{- 1}$ . The thrust on the rocket is

$2 \times 1 0^{3} N$

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

$2 \times 1 0^{6} N$

$2 \times 1 0^{8} N$

Thrust, $F = u (\frac{d m}{d t}) = 5 \times 1 0^{4} \times 40 = 2 \times 1 0^{6} N$

Q. In a rocket of mass 1000kg, fuel is consumed at a rate of 40kgs−1. The velocity of gases ejected from rocket is 5×104ms−1. The thrust on the rocket is

2×103N

2×104N

2×106N

2×108N