I have no clue what to do on this problem. it is Rachel pulls her 18kg suitcase at a constant speed by pulling on a handle that makes an angle with the horizontal. The frictional force on the suitcase is 27N and Rachel exerts a 43N force on the handle. A) what angle does the handle make with the horizontal? B) what is the normal force exerted on the suitcase? Where do I start?