Please help
Imagine that you have a bicycle wheel that you start spinning. Then you place your hand on the wheel to stop it.
1. What kind of energy does the wheel have once it is stopped?
2. What kind of energy does the wheel have while it is spinning?

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.