In the figure, the lever arm, l, is distance r from the hinge to the point at which you exert your force. The torque is the product of the magnitude of the perpendicular force multiplied by the lever arm.
Children normally need a certain number of calories each day (energy allowance) that their bodies use as energy for normal daily activities (walking, breathing, etc.). This ranges for boys from 2000 calories for a 7-10 year old, 2500 calories for an 11-14 year old, and 3000 calories for a 15-18 year old. For girls the ranges are from 2000 calories for a 7-10 year old, to 2200 calories for an 11-18 year old. These are only estimates and some children need more (fast metabolism) or less (slow metabolism) of an energy allowance for daily activities.
According to the Dietary Guidelines for Americans 2010, 2-year-olds need about 1,000 calories and 3-year-olds require 1,000 to 1,400 calories each day. The fat acceptable macronutrient distribution range for children ages 1 to 3 is 30 to 40 percent of their total calories.Fat provides nine calories per gram. Therefore, a toddler who consumes 1,000 calories would require 33 to 45 grams of fat each day.The Institute of Medicine recommends toddlers ages 1 to 3 consume 700 milligrams of omega-3s each day. Ask your pediatrician about purified omega-3 oils for children.herefore, a toddler who consumes 1,000 calories would require 33 to 45 grams of fat each day. The Institute of Medicine recommends toddlers ages 1 to 3 consume 700 milligrams of omega-3s each day. Ask your pediatrician about purified omega-3 oils for children.