Q.

Weightlessness experienced by spaceman in a space-ship orbiting the earth is the result of

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a

zero gravity

b

surface tension

c

acceleration

d

inertia

answer is B.

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Detailed Solution

Weightlessness means that there is no reaction on a body from the floor. Since both the artificial satellite & the astronaut have same centripetal acceleration (as in a lift; which is falling freely, we does not feel any weight, because both lift & we fall with same acceleration). 

The astronaut does not feel any weight inside the space craft

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