$A$ rocket which has a mass of $3.5 \times 10^4 \,kg$ is blasted upwards with an initial acceleration of $10 \,m/s^2$. The initial thrust of the blast is-
- A$3.5 \times 10^5 \,N$
- B$7.0 \times 10^5 \,N$
- C$14.0 \times 10^5 \,N$
- D$1.75 \times 10^5 \,N$
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