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.
How are the answers affected by factoring in the coefficient of social friction produced by the laughter of the male flight attendant watching this demonstration?