High School Physics | Episode 5: Circular Motion and Centripetal Force Explained with Examples

Welcome to episode 5 of High School Physics. Today we're diving into a dynamic topic, circular motion and the centripal force that makes it possible. Circular motion is movement along a circular path. It can be uniform where speed is constant or nonuniform where speed changes. In circular motion, we use angular displacement, angular velocity and angular acceleration. These describe rotation rather than straight line movement. You see circular motion in action when a car turns a corner, the moon orbits Earth, or a child swings on a ride at the park. Centripal force is the force that pulls an object toward the center of a circular path. Without it, the object would move in a straight line due to inertia. The formula is FC is equal to mass of object square of velocity divided by radius. where FC is centrial force, M is mass V is speed and R is radius of the circle. People often think a force is pushing outward but that is just inertia. The real force centrial force is always directed inward. The source can vary. For example, road friction provides centrial force for a turning car. Tension provides it in a spinning string. Gravity keeps planets in orbit. Example problem. A two dilio object moves at 4 m/s in a circle of radius 2 mm. What's the centrial force? Tell me answer in comments. Understanding circular motion helps us design roller coasters, satellites, racetracks and even so remember objects moving in circles need a center-seeking force. It is centripal force. Without it motion would be straight not curved. In episode 6, we will explore work, power, and energy in the foundation of mechanical systems.