A 2-kg-block is pushed upward from underneath by a constant 50-N vertical force. The block is sliding on the bottom side of an inclined plane that makes an angle of 70º with respect to the vertical. T

A 2-kg-block is pushed upward from underneath by a constant 50-N vertical force. The block is sliding on the bottom side of an inclined plane that makes an angle of 70º with respect to the vertical. The coefficient of kinetic friction between the block and the plane is 0.2. 

(a) Determine if the net force points up or down the incline? 

(b) If after traveling a total distance of 4 m the block is traveling at a speed of 4.443 m/s up the incline, what was the initial speed of the block?