A given package of 50k is moved across the floor with an applied force while accelerating at 4m/s^2 A) Draw a freebody diagram of ALL the forces (4 of them: applied, gravitational, friction, normal)
B) Determine the net force on the package
C) If the frictional force on the package is 100N, then determine the applied force necessary to accelerate it.

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)