Friction slows things down.
kinetic friction
sliding friction
If there is friction, speed will usually be slowed down.
Static friction is usually greater than kinetic friction. This is because static friction occurs between stationary objects, where surface irregularities can interlock and require more force to overcome. Once an object starts moving, kinetic friction takes over, which is generally lower because the surfaces are already in motion.
usually greater than the sliding friction
Sliding Kinetic Friction is usually greater than Rolling Kinetic Friction. Sliding Kinetic Friction is caused by two objects being dragged together, providing more opportunity for the objects' microscopic hills and valleys to catch.
usually when you rub on to something it creates heat so that makes friction. Ice has no friction because it slips
Friction is a force, which (usually) tends to slow moving things down.
False. The force needed to overcome static friction is usually greater than the force needed to overcome kinetic friction.
Kinetic Friction replaces Static Friction when an object is in motion.
Usually gravity and friction.
Usually to reduce friction and/or to remove heat from the surface to prevent damage by friction and/or heat.