   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.
7 month old babyâs sleep. At this age, some 7 month olds can sleep through the night, without a feeding, and take two to three naps. Some babies donât ever have 3 naps, but many will have 3 naps until around 9 months.The third nap is almost always a short 30-45 minute cat nap.Your 7 month old should be napping a total of 2-3 hours per day plus sleeping 11-12 hours at night. If youâre having trouble with naps, you might be interested in helping your baby nap.All babies vary, but here are some rough schedules you can use to make your own for your unique baby.t this age, some 7 month olds can sleep through the night, without a feeding, and take two to three naps. Some babies donât ever have 3 naps, but many will have 3 naps until around 9 months.