I would like to know if the degree is needed to solve the problem and what to do if it is: Rudolph pulls Santa's sleigh over ice with a force of 2350N at an angle of 25°. The sleigh travels 25 meters before stopping to hitch up the other reindeer. How much work does Rudolph do?

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.