Friction is a force that opposes the sliding or rolling of one solid object over another. Friction is what makes motion possible on Earth.
How do I calculate friction?
To calculate friction force between an object and the ground use the formula F = μN, where μ is the friction coefficient and N is the normal force.
What are 4 types of friction?
The four types of friction are static friction, sliding friction, rolling friction, and fluid friction.
Static friction exists between a stationary object and the surface it is placed on.
Sliding friction exists between two objects sliding over each other.
Rolling friction exists between the surface and rolling balls or wheels.
Fluid friction exists between a moving object and the fluid it's traveling through.
What factors affect friction?
The main factors affecting friction are the smoothness of the sliding object and the surface, and the weight of the object or the amount of force on the surface by the object.