world without friction could look like this welcome to moomoo math and science and types of frictional forces with some examples friction is the force that opposes the sliding motion of two touching surfaces friction is caused by microscopic bumps on the surface called micro welds in this video we're going to look at four types static friction sliding which is sometimes called kinetic friction rolling friction and fluid friction up first static friction is friction in which two surfaces are not moving past each other take a look at these kettlebells they remain stationary as the gentleman is doing
push-ups due to friction this bell as you ring it stays in place due to friction this exercise machine has a couple places where friction comes into play and keeps it stationary and finally these cars can remain parked on the hill due to static friction next we have kinetic friction and kinetic or sliding friction is friction when two surfaces slide past one another some examples the sport of curling is perfect for sliding friction as you move your finger across a mouse path sliding friction comes into play and snowboarding is an example of sliding or kinetic friction
rolling friction is friction between a rolling object and the surface it rolls on for example take a look at this bike tire and the road the skateboard wheels this motorcycle tire is very important sometimes you have a combination of both another example check out these skateboarders and finally let's take a look at fluid friction and it is friction that occurs when objects move across or through a fluid and the fluid can include both air and liquid some examples these fish they are fighting or working with the fluid friction of the water and sometimes this friction
is called drag this wake border and this airplane you could say is going through a sea of air where there is fluid friction thanks for watching and moomoomath uploads a new math and science video every day please subscribe and share
