A bicycle is heading West and traveled 12000m in 300s before being forced to apply the brakes. He skids for another 4000m in 200s and finally stops. What was the car's final velocity?

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.