   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.
When babies are about 3 to 4 months old, daytime sleep starts to take on a predictable pattern. When this happens, you can start developing a naptime routine. 6 Months. At 6 months of age, babies take about 2 to 3 naps daily.They follow a pattern of 1 early in the day, 1 after lunchtime and another before dinnertime.9 â 12 Months. When babies reach 9 to 12 months, they usually only take two naps daily.etween 1 year and 18 months, some babies may only nap one time a day in the afternoon hours and may do this until they are 3 to 5 years old. At this time, some parents find it easier to adjust the bedtime schedule to give them more rest at night.