Use the tool on this page, along with the notes you took in My Work, to create an outline for your final assignments, for which you'll be producing:
As you work on your ourline using the Organize It tool, eel free to review all the videos and glossary words you've learned, which are all posted at the bottom of this page.
| Keyboard Shortcut | Action |
|---|---|
| Space | Pause/Play video playback |
| Enter | Pause/Play video playback |
| m | Mute/Unmute video volume |
| Up and Down arrows | Increase and decrease volume by 10% |
| Right and Left arrows | Seek forward or backward by 5 seconds |
| 0-9 | Fast seek to x% of the video. |
| f | Enter or exit fullscreen. (Note: To exit fullscreen in flash press the Esc key. |
| c | Press c to toggle captions on or off |
Beyond the position, direction, distance and displacement of an object, other important factors in this whole “motion” thing are speed and velocity.
Speed is the measurement of how far an object moves divided by how long it takes to move. And although the concepts of “fast” and “slow” are pretty obvious to the casual observer, the speed of an object is a measurement of the distance divided by the time. Miles per hour, meters per second, inches per year. Things can move at a constant rate, or move at changing rates. You can measure the speed at a certain instant, or an overall average speed of the entirety of the movement. Because it is measuring distance over time, these are all measurements of speed.
Then there is velocity. Velocity is similar to speed, but it measures time, distance, and direction of an object. So 15mph is a measurement of speed. But 15mph west is its velocity. Velocity come in handy when your simple trip becomes a bit less simple.
Each of these measurements- speed and velocity--helps to describe the motion of an object. Which comes in handy for all the things that move in your life.
| Keyboard Shortcut | Action |
|---|---|
| Space | Pause/Play video playback |
| Enter | Pause/Play video playback |
| m | Mute/Unmute video volume |
| Up and Down arrows | Increase and decrease volume by 10% |
| Right and Left arrows | Seek forward or backward by 5 seconds |
| 0-9 | Fast seek to x% of the video. |
| f | Enter or exit fullscreen. (Note: To exit fullscreen in flash press the Esc key. |
| c | Press c to toggle captions on or off |
The earth revolves around the sun, a kicker makes the field goal, and a ball ricochets.
But what makes this change in motion?
Simplified down to its most basic definition: Forces.
A force is a push or a pull that has a magnitude (size/amount) and a direction.
Forces can start motion, when one is bigger than the other, or unbalanced. (kicking a ball)
And forces can also stop or change motion. (ball hitting a wall and bouncing off)
There are all kinds of different forces acting in different ways and directions all the time.
Friction, for instance, is a force between two surfaces that slows movement down.
Gravity is a force that can slow an object down or speed it up, depending on which direction the object is moving. And magnetic force can do the same thing.
Forces are also at play when something is not moving. A ball resting on a table for instance: Both the downward force of gravity, and the upward force of the table are equal. The forces acting upon it are balanced and the ball is not in motion.
And understanding these forces and how they affect the things around us comes in handy, whether you're a physicist, an athlete or an aspiring pool shark.
| Keyboard Shortcut | Action |
|---|---|
| Space | Pause/Play video playback |
| Enter | Pause/Play video playback |
| m | Mute/Unmute video volume |
| Up and Down arrows | Increase and decrease volume by 10% |
| Right and Left arrows | Seek forward or backward by 5 seconds |
| 0-9 | Fast seek to x% of the video. |
| f | Enter or exit fullscreen. (Note: To exit fullscreen in flash press the Esc key. |
| c | Press c to toggle captions on or off |
When measuring and describing motion, there are a lot of details to capture and it can involve a ton of complicated math. But it turns out, graphs are an easy way to visualize motion, if you know how to interpret them. It can get tricky, so we’ll break it down to the basics.
On screen title: Motion Graph Basics
The most basic motion graphs map out the position of an object over a timeline. As time ticks by, and the object moves (or doesn’t), it will be plotted out in different positions along the timeline.
So, if an object is sitting still for ten seconds the graph will look like this.
If an object moves from one place to another at a constant speed, it’s graph looks like this.
If an object starts. Then stops, then starts, and stops and then moves back to its original spot, it’s graph looks like this.
If the slope of the line is steep, it traveled from here to there fast. If the slope is shallow, the object took its sweet time.
From a single motion graph, you can tell distance traveled, displacement, speed, velocity, and all kinds of information about its motion and path, while skipping most of the complicated math.