A) \[\text{4}.\text{5 x 1}{{0}^{\text{6}}}\text{ N}\]
B) \[\text{5}.\text{5 x 1}{{0}^{\text{6}}}\text{ N}\]
C) \[\text{3}.\text{5 x 1}{{0}^{\text{6}}}\text{ N}\]
D) \[\text{6}.\text{72 x 1}{{0}^{\text{6}}}\text{ N}\]
Correct Answer: A
Solution :
Here, \[\Delta m=100\,\,kg,\,\,\Delta t=1\,\,\sec \], Relative speed of gases\[{{v}_{r}}=4.5\times {{10}^{4}}m/s\] Hence, Thrust\[={{v}_{r}}.\frac{\Delta m}{\Delta t}\] \[=4.5\times {{10}^{4}}\times \frac{100}{1}\] \[=\mathbf{4}.\mathbf{5}\times \mathbf{1}{{\mathbf{0}}^{\mathbf{6}}}\]Newton.
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