Frictional Force : It is the force exerted by a surface when an object moves across the surface.
There are two types of frictional forces ;
- Kinetic friction
- Static fraction
- Frictional force can also be defined as the force, which opposes the motion of an object.
- It is also known as the constant force.
- The frictional force also depends on the nature of the surface and degree to which they are pressed together.
- The maximum amount of frictional force is calculated by using the relation ;
Force = Coefficient of friction × Normal force.