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Describe the motion along a straight line
Motion Along a Straight Line

Everything in our world moves. Even stationary things such as your house move in relation to the sun, or to other stars, or .. The classification and comparison of motion is called kinematics and is quite challenging. Before we get too far, I'd like to define a few things.
  • The motion we will be covering in this section will be in a straight line only. This motion can be horizontal, vertical (falling), or even slanted, but it will always be in a straight line.
  • We will not specify the cause of this motion in this section. We will assume specific properties an object will have as it is in motion.
  • An object will be defined as a particle (such as an electron) or an object with particle-like properties where all parts of the particle move uniformly without any rotation. Ex. A book falling from a certain height would qualify, but only if you did not apply any sort of spin to that book.
Knowing that, here is what we will cover:
  • Position and Displacement
  • Average Velocity and Average Speed
  • Instantaneous Velocity and Speed
  • Acceleration
  • Constant Acceleration
  • Free-fall Acceleration


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