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.
Toddlers. Toddlers between the ages of 1 and 2 need about 45 calories per pound of body weight each day, which usually translates into something in the range of 1,000 to 1,400 calories per day. Since children this age have relatively small stomachs, this should be split between three meals and two or three snacks.oddlers. Toddlers between the ages of 1 and 2 need about 45 calories per pound of body weight each day, which usually translates into something in the range of 1,000 to 1,400 calories per day. Since children this age have relatively small stomachs, this should be split between three meals and two or three snacks.