What forces oppose motion?

Friction always opposes motion between two surfaces, although it is not a fundamental force of the universe like gravity. The coefficient of friction is used to describe the ratio of friction between two bodies and the outside force pressing them together. read more

Forces that oppose Motion. In our everyday experience we do not come across perpetual motion - a phenomena which would allow objects to move continuously. read more

Friction is a force that opposes motion. Friction is caused by hills and valleys on the surfaces of two objects touching each other. The amount of friction depends on factors such as the roughness of the surfaces and the force pushing the surfaces together. Two kinds of friction are kinetic friction and static friction. read more