A rocket with a lift-off mass 20,000 kg is blasted upwards with an ini – InterviewSolution

1.	A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s–2. Calculate the initial thrust (force) of the blast.
Answer» Mass of the rocket, m = 20,000 kg Initial acceleration, a = 5 m/s² Acceleration due to gravity, g = 10 m/s² Using Newton’s second law of motion, the net force (thrust) acting on the rocket is given by the relation: F – mg = ma F = m (g + a) = 20000 × (10 + 5) = 20000 × 15 = 3 x10⁵ N

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