Question

Physics fast..........

Answer 1

$thrust = mass \times accelertion \: \\ = 20000 \times (g + 5) \\ = 2 \times {10}^{4} \times (9.8 + 5) \\ = 2.96 \times {10}^{5}$
wish you get your answer.

Answer 2

hello friend....!!!

according to the given question ,

⇒ mass = 20,000 kg

⇒initial acceleration a = 5 m/s²

⇒ g = 9.8 m/s²

we should  find the initial force of the blast ,

we know that ,

F - mg = ma ( according to newton's second law)

implies , F = m ( a + g )

therefore , 

F = 20000 ( 9.8 + 5 )

F = 20000 (  14 . 8 )

therefore ,

F = 296000

therefore ,

F = 2.96 X 10 ⁵ 

the answer is option ' C '

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hope it helps...!!