Static friction is the force that resists the motion of an object when it is at rest or not moving. It is the force that must be overcome in order for an object to start moving.
Static friction is the force that resists the motion of an object at rest, while kinetic friction is the force that resists the motion of an object in motion. Additionally, static friction is typically greater than kinetic friction.
The strength of static friction is affected by the weight of the object, the roughness of the surfaces in contact, and the normal force between the surfaces.
The force of static friction can be calculated using the formula Fs = μs * N, where Fs is the force of static friction, μs is the coefficient of static friction, and N is the normal force between the surfaces.
Static friction can be reduced by using a lubricant between the surfaces, making the surfaces smoother, or by reducing the weight of the object. It can also be reduced by increasing the force applied to the object in the direction of motion.