Here's why:
* Static friction is the force that prevents an object from moving when a force is applied to it. It acts in the opposite direction of the applied force, keeping the object stationary.
* Kinetic friction is the force that opposes the motion of an object already in motion.
To start an object moving, you need to apply a force greater than the maximum static friction force. Once the applied force exceeds this maximum value, the object will start moving, and the friction acting on it will transition from static to kinetic friction.
