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  4. A rocket with a lift-off mass 3.5 × 104 kg is blasted upwards with an initial acceleration of 10 m s-2. Then the initial thrust blast is

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Q. 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 blast is

JIPMERJIPMER 2016Laws of Motion

Solution:

Net upthrust = Weight + Blasted force
$U = mg + 3.5 \times 10^4 \times 10\, m \, s^{-2}$
$U = 3.5 \times 10^4 \times 10\, m \, s^{-1} + 3.5 \times 10^4 \times 10 \, m\, s^{-2}$
$U = 7.0 \times 10^5 \, N$