I am having a busy tutoring day today. Right now I have a short break between students. When the dust settles, I will have worked with 14 people today. Anyway, there is a Pre-AP Physics test tomorrow. This is one of the problems assigned to the students. I always write answers in my book for easy reference. You will notice that I scratched out an answer for part c. I made a flub and recalculated it. I got nervous so I checked the answer key in the teacher's manual. They had it wrong. They don't get many wrong, but I do occasionally find a boo-boo.

On a more practical note. A bag weighing 70 newtons has a mass of 7.1 kilograms and a weight of 15.7 pounds. You know that this problem is ficticious because there isn't a female flight attendant around that can get by with less than 30 pounds of stuff in her flight bag.