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  1. Why is weightlessness experienced while orbiting the earth in space ships ?

  2. A.

     Inertia

    B.

     Acceleration

    C.

     Zero gravity

    D.

     None of these

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    Answer : Option D

    Explanation :

    Earth-orbiting astronauts are weightless for the same reasons that riders of a free-falling amusement park ride or a free-falling elevator are weightless. They are weightless because there is no external contact force pushing or pulling upon their body.


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