As per the question,
Initial velocity of the rocket is (u)=0
Final velocity (v)=45 m/sec
time (t)=15 sec
Mass of the astronaut =57 Kg
Now, applying the newton's first law of motion,
Let the acceleration of the rocket is a,
Now,
During the take off of the rocket, pseudo force will work on astronaut.
Hence,
Hence total reading of the weighting machine =
Hence total reading of the weighting machine will be 729.6N.
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