Static: A cars wheels (while car and wheels are stopped, or while car is moving and wheels are rolling), a doorstop, a rock on a hill (not sliding down) and the force keeping a nail in some wood.
Sliding: A cars wheels (during burnouts or when brakes are applied too hard and the car skids), dragging a computer mouse along a table, Ice skaters blades and a drink slid down the bar to you.
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Sliding friction occurs when two surfaces slide past each other, like when you push a book across a table. Static friction acts between stationary objects and prevents them from moving when a force is applied, such as trying to push a heavy box on the floor.
Static friction is the force that must be overcome to set an object in motion when it is at rest. It is produced when two surfaces are in contact and not sliding past each other. Static friction is typically greater than kinetic (sliding) friction.
Sliding friction is always less than the static friction by small amount.
Static friction is typically stronger than sliding friction. Static friction occurs when an object is at rest and needs to overcome the initial force required to start moving, whereas sliding friction occurs once the object is already in motion.
Types of friction include static friction (sliding), kinetic friction (rolling), and fluid friction (fluid). Examples of sliding friction include pushing a heavy box across the floor, rolling friction is experienced when a ball rolls on the ground, and fluid friction occurs when swimming in water.
There are four main types of friction: static friction (occurs when an object is at rest), kinetic friction (occurs when an object is in motion), rolling friction (occurs when an object rolls over a surface), and fluid friction (occurs when an object moves through a fluid such as air or water).