When an object moves in a circle, the external force (or the component of the external force pointing to the center of the circle along the radius) is called centripetal force, also known as normal force.

The cohesion that guides people to move forward freely can be divided into cohesion and centripetal force according to the different objects of group members to implement unity and cooperation. Cohesion refers to the degree of unity and cooperation between group members and group units, and centripetal force refers to the degree of unity and cooperation among group members centered on group leadership. Simply put, centripetal force also refers to the degree of obedience of group members to leaders.