This is related to gravity and vaccuum, which says that when the body is in vaccuum, its weight is lost. I need any examples.
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1$\begingroup$ Possible duplicate of Weightlessness for astronauts $\endgroup$– David HammenJan 13, 2016 at 12:52
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$\begingroup$ I don't understand the votes to close on the grounds of being unclear as to what is being asked. It's quite clear what is being asked, and what is being asked is a duplicate of many existing questions on weightlessness. $\endgroup$– David HammenJan 13, 2016 at 12:56
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This is not related to vacuum, the statement just tells you that far away from big masses like the Earth there is no gravity acting on a body. In this case the gravitational field $\vec g=0$ and therefore $\vec F_g=m\vec g=0$.
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1$\begingroup$ This answer misses the point. Astronauts and cosmonauts on the International Space Station are in a near weightless state, yet the gravitational force is about 88% of standard gravity at that altitude. $\endgroup$ Jan 13, 2016 at 13:01
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$\begingroup$ In this case see a different answer of mine: physics.stackexchange.com/q/109636 $\endgroup$– PhotonJan 13, 2016 at 21:39