A rocket with a lift-off mass $3.5 \times 10^4 \mathrm{~kg}$ is blasted upwards with an initial acceleration…

A rocket with a lift-off mass $3.5 \times 10^4 \mathrm{~kg}$ is blasted upwards with an initial acceleration of $10 \mathrm{~m} / \mathrm{s}^2$. Then the initial thrust of the blast is
  1. $3.5 \times 10^5 \mathrm{~N}$
  2. $7.0 \times 10^5 \mathrm{~N}$
  3. $14.0 \times 10^5 \mathrm{~N}$
  4. $1.75 \times 10^5 \mathrm{~N}$

Solution

Thrust $=$ Mass $\times$ Acceleration $=3.5 \times 10^4 \times 10=3.5 \times 10^5 \mathrm{~N}$

Asked in: JEE Main 2003

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