List three forces being exerted as you complete this reinforcement exercise

The three forces being exerted as you complete a reinforcement exercise are the following;

- writing

- farting

- gravity

They are all explained in Newton's first law of motion that states that an object that is at rest will likely remain to be at rest unless only if it is acted upon.

The three forces being exerted as you complete reinforcements of exercises is writing, farting and gravity.