Friction is a force that always opposes motion. Force is measured in newtons (N). A force is a push or a pull. Contact forces arise between two objects which are in contact. Non-contact forces act ...

Particle P is able to slide within a smooth slot cut into a disk. The disk is rotating at a constant rate, Ω. We desire to understand the reaction force of the disk slot on the particle as the ...

Isaac Newton's First Law of Motion states, "A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force." What, then, happens to a body ...