Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Essentially, the more friction a machine has, the less efficient it is. And the less friction a machine has, the more efficient it is.
An example of friction are the wheels on a car. When you brake, you stop because of friction. The braking wheel sliding on the road creates a lot of friction. Now imagine driving a car on ice. When you brake, you will slide for a few seconds because there is extremely low friction. The wheel rubbing on the ice does not create friction because the ice is wet, like a lubricant.
This is a video about friction and mechanical advantage.
Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Essentially, the more friction a machine has, the less efficient it is. And the less friction a machine has, the more efficient it is.
An example of friction are the wheels on a car. When you brake, you stop because of friction. The braking wheel sliding on the road creates a lot of friction. Now imagine driving a car on ice. When you brake, you will slide for a few seconds because there is extremely low friction. The wheel rubbing on the ice does not create friction because the ice is wet, like a lubricant.
This is a video about friction and mechanical advantage.