why a freely falling body experiences weightlessnes? explain in details

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$I n a n e l e v a t o r, w h e n a n e l e v a t o r m o v e s i n d o w n w a r d d i r e c t i o n, a p p a r e n t w e i g h t o f a p e r s o n i n a n e l e v a t o r i s g i v e n b y : R = m (g - a) i n f r e e f a l l, a c c e l e r a t i o n o f a n e l e v a t o r i s e q u a l t o g a = g R = m (g - g) R = 0 a p p a r e n t w e i g h t o f m a n i s z e r o s o t h i s i s c a l l e d w e i g h t l e s s n e s s .$

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