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1. What is the apparent weight during take-off of an astronaut whose actual weight is 750N if the resultant upward acceleration is 5g?
They say the answer is 4500 by F=m(g+5g)
but why?
5g is upwards and g is downwards so isn't one of them supposed to become negative??
2. Have you tried looking at it in terms of F=ma ?
3. (Original post by Posama)
What is the apparent weight during take-off of an astronaut whose actual weight is 750N if the resultant upward acceleration is 5g?
They say the answer is 4500 by F=m(g+5g)
but why?
5g is upwards and g is downwards so isn't one of them supposed to become negative??
Because in order to accelerate him upwards at 5g he will be pushed in to the seat with a force of 5mg + his weight which is mg

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Updated: September 27, 2016
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