Question

give 5 examples of circular motion and the source of the centripetal force that keeps them in motion

Answer 1

the orbit of any stellar body around another, the force in this case is gravity

A race car in a circular track, the force is the friction from the ground and tires

An mass attached to rope that is swung in a circular motion, the force is the normal force from the rope

an electron moving perpendicular to a uniform magnetic field, the force is the magnetic force

a roller coaster in a loop, the force is the normal force from the track

Answer 2

For the rope, I've usually been taught to call that tension. All of those look great, and diverse!