#### Transcript of Projectile Motion - chapter 5

**Projectile Motion - chapter 5**

Review : Thus far we have looked at linear motion - that is things moving in a straight line. We have considered both things moving at constant velocity (where a = 0) and accelerated motion.

Projectile motion is often curved motion - it moves in two directions.

(A projectile is any body that moves through air or space acted on only by gravity)

Now we are going to look at things moving in two directions - both horizontally and vertically.

First, lets watch this as an introduction: http://www.nationalstemcentre.org.uk/elibrary/resource/2084/monkey-and-hunter

The horizontal component of motion for a projectile is just like the horizontal motion of a ball rolling freely along a surface with no friction - constant velocity in one direction.

Horizontal Movement

The vertical component of motion for a projectile's velocity is like the motion for a free falling object - gravity pulls in down at 10 m/s^2.

Vertical Movement

THIS MEANS THEY ARE COMPLETELY INDEPENDENT, ONE DOES NOT AFFECT THE OTHER.

The path of a projectile depends on the angle that it is launched from the horizontal.

Remember that these cases are all without air resistance - in reality this isn't the exact motion. More on that later......

We can solve by figuring out the horizontal and vertical components of the motion and adding them together, using the parallelogram rule.

So there is a vertical and horizontal component to this type of motion --- but what does the thing actually go???

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