What is force and motion?

Force is any influence to an object which changes its motion, while motion itself is the change in position of an object in relation to is speed, location and acceleration. There cannot be movement without force used against an object to set it in motion.

A bicycles tires move because the person riding it exerts force on the pedals, which in turn moves the chain and the tires. This force causes the bike to be in motion. If there is no force being exerted on an object, then the object is said to be at rest and have a constant position. An object's motion cannot change unless force is acted upon it as stated by Newton's First Law.