1. A box with mass mis dragged across a level floor with coefficient of kinetic friction by a rope that is pulled upward at an angle above the horizontal with a force of magnitude F. In terms of the variables given, write an expression for the mass of the box needed so that it moves across the floor at a constant speed. a. Start by drawing a free-body diagram of the box and breaking forces into their components. b. Next, write out equations for the x-and y-components of the net force acting on the box. c. Write out an expression relating the magnitude of the normal force to the magnitude of the friction force. d. Combine your equations to find the answer to the