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š¬ Simplest motion first
Nature is full of complex motion. To understand it, we start with the simplest kind — motion along a straight line. Where have you seen it?
What is linear motion, and where do we see it?
- When an object moves in a straight line, its motion is called linear motion (motion in a straight line) — the simplest kind of motion.
- Examples: children in a swimming race, a vertically falling ball, a car on a straight highway, a train on a straight track.
- To discuss any motion, we first describe the object’s position at various instants of time.
