   A heavier plane has more momentum (when thrown at the same speed),  but it's also got more downward force acting on it. If it has the  same wing area, though, it has the same lift, so it drops more  quickly than a light plane (objects fall at the same speed only in  the absence of air resistance).
By 2 months, baby's bedtime should be between 6:00-8:00pm and should occur about 1 hour after the last nap ends. 3 months: babies this age should be on a solid 4 nap schedule with the last nap of the day ending by 5:00pm.
Some transition to 2 naps at 6 months old and others not until 9 months and I even had a mom with a 12-month old still taking three naps! All babies vary. A very popular sleep book, Healthy Sleep Habits, Happy Child by Weissbluth, says that only 17% of babies need a third nap after 5 months old.he used to wake 2-3 times, now most nights she only wakes up once between 2 and 3 to nurse, goes right back to sleep, and then wakes up for the day between 6:30 and 7. Thank you so much for your suggestions, they really did work!â -Nadia. There is a lot of confusion about how many naps your 6 month old baby needs.