What are two ways engineers use their understanding of KE and PE to make their designs better/safer?

Write a question about how changing temperature affects the gas inside the sports ball

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing

Aspacecraft that renters the earth’s atmosphere drastically slows down. the amount of kinetic energy the spacecraft has as it reenters the earths atmosphere