تجــــــمـــع اـلفــيـــــزيـــــــاء ..~

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المشاركة الأصلية كتبت بواسطة ‪ώзd‬ 17. A man weighing 800 N is standing in an elevator moving with a constant velocity. The force exerted by the man on the floor of the elevator is: a) less than 80 N b) 800 N c) between 80 and 800 N d) more than 800 N الجواب 800 ليش ؟؟

F=ma
mg=ma
mg=0
mg=W=800 N