Eat more food, but make sure it is healthy and that its not all fat, sugers and salts. Do exursice and drink plenty of water.
Under weight is from 90 down but it also depends on their size.
Under weight, healthy weight, over weight, obese
Yes and no, it depends how much under weight, if it's just a pound or something you can just gain that, if it's really under weight I would very much worry. It's not good to be underweight or over weight.
increase calorie intake
Weight them under gravity or calculate from momentum of impact or spring load under centripetal force in space. Then refer the weight or the force to the gravity of earth at 9.81m/s2 and account for its' weight under earth gravity.
130 and under
no
If you under eat you will lose some weight, and although it is good to fat people, who need to lose some weight, to thin people, who sometimes need to gain weight, under eating could lower their life expectancy
If you under eat you will lose some weight, and although it is good to fat people, who need to lose some weight, to thin people, who sometimes need to gain weight, under eating could lower their life expectancy
Unless like you and myself it does not matter what weight you are as you're under the age of 16
Laguna heavy duty book cases are designed to not bow under the weight of books.
Stock Curb Weight: just under 3800lbs (optional equipment increases weight)