If each box weighs 200lb , determine the least horizontal force P that the man must exert on the top box in order to cause motion. The coefficient of static friction between the boxes is μs = 0.80, and the coefficient of static friction between the box and the floor is μ′s = 0.55.
https://session.masteringengineering.com/problemAsset/1526808/1/Probs.8-57_58.jpg

Question

If each box weighs 200lb , determine the least horizontal force P that the man must exert on the top box in order to cause motion. The coefficient of static friction between the boxes is μs = 0.80, and the coefficient of static friction between the box and the floor is μ′s = 0.55.
https://session.masteringengineering.com/problemAsset/1526808/1/Probs.8-57_58.jpg

kainui · Answer

So is the whole thing going to slide, is the top box going to fall off, or is the whole thing going fall over?

kainui · Answer

This is a question my little brother sent me last semester who's in school to become an engineer. He said it was a fun problem, and I sorta forgot about it but just found it and now it's bugging me since I don't really know what to do.

parthkohli · Answer

Alright, just draw free-body diagrams and wish for the best.|dw:1433696058786:dw|