Motion is all around us. There is no time in a day where we don't see motion. Motion, in science, is defined as change in position per unit time. For example, when you wake up in the morning, move from your bed (we arbitrarily assign it as your initial position) to the comfort room (final position), then you changed your position (or your location) and for obvious reason, it took you some time to move from your bed to the comfort room. What is not motion then? Whenever your at rest, that is, when your are not changing your location, then you are not in motion. There two ways we can describe motion, constant and accelerated.
Constant Motion
When you move in a straight line with the same speed, then your are in constant motion.
Accelerated Motion
There are three ways to achieve accelerated motion:
1. you change your speed (slowing down or speeding up);
2. you change your direction (when you do a sudden U-turn or when you are in Uniform Circular Motion);
3. you change both your speed and direction (basically, most things we see daily)
To better understand the two description of motion, watch the video below and try to answer the embedded questions.
