The alarm at a fire station rings and a 84.5-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 4.47 m). just before landing, his speed is 1.49 m/s. what is the magnitude of the kinetic frictional force exerted on the fireman as he slides down the pole?

What are two different ways you could find the value of a? explain these methods.

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.