A jogger runs 32 m [E] in 10.0 s and then 21 m [W] for 8.0 s. What is the jogger's average velocity? ​

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

It is really hard for me right know

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.