   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.
By 9-12 months old, your baby will need about 14 hours sleep each day. A typical child of this age will sleep about 11 to 12 hours at night with two naps during the day.Each nap will be about one to two hours long.You may find that by the time your baby is a year old, her morning nap is shorter â and she may give up that morning nap! Plan lunch for about noon with an afternoon nap at about 2:00 PM. 2  Most babies will need a snack after the nap. 3  Dinner should be with the family at your regular dinner time. 4  If you follow this schedule, your 9-12 month old will be ready for bed by 8:00 PM after a bath and snack.