Defining Force. Including its dimensions, demonstrations of force and mass affecting acceleration, showing that a force is an interaction between two objects and contact vs. field forces.
Content Times:
0:11 Defining force
0:59 Demonstrating how ...force and mass affect acceleration
2:18 Demonstrating why a force doesn’t necessarily cause acceleration
3:20 Force is a vector
3:39 A force is an interaction between to objects
4:14 Contact vs field forces
5:07 The force of gravity is a field force
5:46 Face and snow force interaction
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The free body diagram we first learn is not entirely accurate. All of the forces are not drawn from the center of mass of the object. Learn why we start this way and, when we get torque, what the free body diagrams will actually look like.
Conten...t Times:
0:12 Reviewing the first free body diagram
0:39 A more correct free body diagram
1:22 Comparing this approach to the projectile motion approach
1:52 When we get to torque
2:42 The green screen
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Previous Video: Introduction to Free Body Diagrams or Force Diagrams
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Concepts: Newton, Net Force, Unbalanced Force, Acceleration, Friction -------------- Part of a Blended Classroom taught at Millard West High School. Produced...

Defining the Force of Gravity or Weight and Gravitational Mass. We also determine the dimensions for force in both Metric and English units.
Content Times:
0:11 Defining the Force of Gravity or Weight
1:09 Defining Gravitational Mass
2:12 The di...rection of the Force of Gravity
2:47 Determining the dimensions for force
4:09 The English unit for force
4:54 Slug vs. Blob
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Previous Video: Introduction to Force
More about slugs and blobs.
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Picture of Newton - Attributed to 'English School' (Bonhams) [Public domain], via Wikimedia Commons[more]

We define and discuss how to draw Free Body Diagrams which are also called Force Diagrams. In addition we define the force normal and the force applied. Force of friction and center of mass are briefly discussed, however, a much more detailed discu...ssion of each is left for later lessons. Free Body Diagrams are drawn on a level surface and on an incline.
Content Times:
0:12 Defining Free Body Diagram or Force Diagram
0:46 Center of mass
1:13 The force of gravity
2:08 The force normal
3:28 Adding a force applied
4:02 The force of friction
4:53 Adding an incline
5:54 The force of friction caused by the incline
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Next Video: The Reality of our First Free Body Diagram
Previous Video: Weight and Mass are Not the Same
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Three major differences between weight and mass are discussed and three media examples of weight in kilograms are presented (and you should know that weight is NOT in kilograms).
Content Times:
0:18 Base SI dimensions for weight and mass
1:25 NAS...A: weight in kilograms
1:38 Michio Kaku: weight in kilograms
1:52 Derek Muller of Veritasium: weight in kilograms
2:30 Weight is a vector and mass is a scalar
2:53 Weight is extrinsic and mass is intrinsic
3:52 Comparing weight and mass on the Earth and the moon
4:45 Space elevators
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Next Video: Introduction to Free Body Diagrams or Force Diagrams
Previous Video: Introduction to the Force of Gravity and Gravitational Mass
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Weight in kilograms in the media:
NASA: What Was the Saturn V?
The Physics of the Impossible by Michio Kaku
Thank you Derek Muller of Veritasium for letting me use a 10 second clip of one of your videos. I hope you agree that, as promised, I did not deride you.
Pictures:
Moon http://upload.wikimedia.org/wikipedia/commons/e/e1/FullMoon2010.jpg
- By Gregory H. Revera (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons
International Space Station - http://commons.wikimedia.org/wiki/File%3AISS_after_completion_(as_of_June_2006).jpg
By NASA [Public domain], via Wikimedia Commons from Wikimedia Commons
Earth - you won’t find the permissions for that picture here, because I took that picture and so I OWN IT!!! Yep, i took that picture. [Did you really read this far? wow.] It’s actually a picture of Science on a Sphere at The Detroit Zoo. http://www.detroitzoo.org/attractions/science-on-a-sphere[more]

Finding the net force caused by three brothers fighting over a stuffed turtle. We break one vector in to components and find the components of the net force in order to solve for the net force.
Content Times:
0:16 My 3 brothers
0:29 The problem
... 1:13 The givens
1:55 Drawing the Free Body Diagram
2:39 Breaking the Force of Chris in to its components
4:09 Redrawing the Free Body Diagram
4:54 Finding the components of the net force
5:47 Finding the net force
7:10 Finding the direction of the net force
8:02 Shouldn’t Turtle accelerate?
8:39 Directing my brothers
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Next Video: Summing the Forces is Vector Addition
Previous Video: Force vs. Time on a Dynamics Cart
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Thank you very much Ken, Jim and Chris, my three brothers, for agreeing to be in this video![more]

When the forces in a free body diagram don’t change students often think that Newton’s Second Law will yield the same results. This demonstration shows that is not true. This is a step-by-step analysis of tension force as a function of time for a d...ynamics cart in motion on a horizontal track.
Content Times:
0:13 Reviewing known information
0:47 The three parts in this demonstration
1:22 Drawing the two free body diagrams
2:27 Understanding the free body diagrams
3:12 Identifying the String Direction
4:08 Finding the Tension Force during Part #1
6:06 Theoretical vs. Experimental Tension Force during Part #1
6:28 Finding the Tension Force during Part #2
7:52 Theoretical vs. Experimental Tension Force during Part #2
8:13 Finding the Maximum Acceleration during Part #3
9:37 Instantaneous vs. Average
10:21 All the graphs sequentially
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Next Video: A Three Force Example of Newton's 2nd Law with Components
Previous Video: Introductory Newton's 2nd Law Example Problem and Demonstration
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Concepts: Force, Attractive Force, Repulsive Forces, Change to Forces (what happens) -------------- Part of a Blended Classroom taught at Millard West High S...

Mr. Higgins demonstrates the 4 types of friction: Static, Sliding, Rolling and Fluid. ------------------- If you like this series, please subscribe. Have sug...

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