How does child support work in the US?

How does child support work in the US?
it works like this. if you get a divorce, the husband has to pay child support. it is like this because when they made this husbands worked and wife stayed home so the wife needed money to support the child.

Added: The above is a VERY BASIC answer. In actuality, the assessment of child support COULD apply to either parent. It applies to both parents regardless of sex, and it is awarded on the basis of which parent (Mom or Dad) is the 'custodial parent' (i.e.: the parent with permanent custody of the child(ren)).
It is calculated on a standardized (for that particular state) sliding percentage scale taking into consideration both the contributing and receiving parents income. Child support is awarded by court order or by order of the Department of Child and Family Services, and the 'contributing' parent can have their pay garnished for the awarded amount every month. For information about your particular jurisdiction, contact the family division of your state civil court system.