Uncle Needs Help !! My niece came to me for help with your physics homework....but I thought she said Physical Science homework ! So I need help !! Can anyone help ? She has to turn this blasted homework page into school on Tuesday. I am not trying to do her work for her I am just trying to understand all the forumulas and problems so that I may explain to her. Please help !! For starters I am trying to convert her weight : 135 lbs into: newtons, mass, and kilograms..