Answer:
static, sliding, rolling, and fluid friction
Explanation:
Static friction acts on objects when they are resting on a surface. For example, if you are hiking in the woods, there is static friction between your shoes and the trail each time you put down your foot
Sliding friction is friction that acts on objects when they are sliding over a surface. For example, you use sliding friction when you write with a pencil. The pencil “lead” slides easily over the paper, but there's just enough friction between the pencil and paper to leave a mark.
Rolling friction is friction that acts on objects when they are rolling over a surface. For example, this explains why most forms of ground transportation use wheels, including bicycles, cars, 4-wheelers, roller skates, scooters, and skateboards.
Fluid friction is friction that acts on objects that are moving through a fluid. For example, the air resistance on a skydiver
