This paper presents a safe control applied to a reaction wheel pendulum. assuring that the system satisfies stability objectives and safety constraints. Safety constraints are specified in terms of a set invariance and verified through control barrier functions (CBFs). The existence of a CBF satisfying specific conditions implies set invariance. https://www.jmannino.com/super-save-NFL-Chicago-Bears-Blast-iPhone-14-Plus-Skin-p41373-big-savings/