The force of friction is a resistive force that opposes the motion or attempted motion of an object. It is caused by the interactions between the surfaces of two objects that are in contact with each other.
The force of friction can be calculated using the equation F = μN, where F is the force of friction, μ is the coefficient of friction, and N is the normal force between the two surfaces.
The force of friction is affected by the type of surfaces in contact, the roughness of the surfaces, the normal force between the surfaces, and the coefficient of friction.
Torque is a measure of the twisting force that causes an object to rotate. It is calculated by multiplying the force applied to an object by the distance from the axis of rotation to the point where the force is applied.
The force of friction can create a torque that opposes the motion or attempted motion of an object. This is because the force of friction acts in a direction perpendicular to the direction of motion, creating a torque that resists rotation.