A forklift truck is being used to raise a 60 kh crate onto a shelf. The crate contains breakables so it must not slide on the forklift, in case it bangs into the uprights. The crate will be lifted constant accelerations, first speeding up at10 m/s2 at 60o to the horizontal, and then slowing down at 5 m/s2 at 60o to the horizontal. Find what will the friction force be during each part of the motion? Determine what kind of friction force is this and Why?