Friction is a force that arises from the contact between two materials, influenced by their electromagnetic interactions. To calculate friction, relevant equations include the frictional force formula, which is the product of the coefficient of friction and the normal force. For inclined planes, understanding the angle of inclination is crucial for analyzing forces acting on an object. Various graphic software, such as MS Paint and Adobe Photoshop, can be used to create illustrations of inclined planes. Resources are available online for further exploration of friction and inclined plane concepts.