State the relationship between the mass of trolley and acceleration of the trolley?

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Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

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.