5. Billy is trying to slide an 80 kg box of equipment across the floor. The coefficient of static friction between the box and the floor is 0.55. A) If Billy only pushes horizontally against the box, how much force must he push with to initiate movement of the box? B) Billy then decides to pull the box instead at an angle of 25o. How much force must he produce to move the box by pulling it an angle compared to pushing it?

May someone explain how to do this question?

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane