Let's go beyond the mechanics. Differential calculus is a tool, invented to solve the most challenging problems in science and engineering.  For  instance, Newton used differential calculus to express the equations of  planetary motion around the Sun, as well as the rate at which a warm  object cools off in a colder environment. This week, you'll become familiar with more of those applications by presenting them to your classmates.  

• Please research at least one source of information on engineering applications of derivatives.
• Create a summary of what you found (in your own words!) and describe an example application.  Keep your post clear and concise, under 500 words.
• You can use any source you like. Be sure to include the citation of your source in APA format.