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

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1.75×105N

3.5×105N

7.0×105N

14.0×105N

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detailed solution

Correct option is C

Initial thrust must be m[g+a]=3.5×104(10+10)=7×105N

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A rocket with a lift-off mass 3.5×104 kg is blasted upwards with an initial acceleration of 10m/s2. Then the initial thrust of the blast is

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