Force and Motion: Normal, Applied, & Frictional Forces
Clip: Special | 1m 4sVideo has Closed Captions
What is a normal force?
Scientists have classified forces into different kinds. Learn more about friction, applied forces and normal forces and how they work on the Earth and in the universe.
Science Trek is a local public television program presented by IdahoPTV
Major Funding by the Laura Moore Cunningham Foundation and the Idaho National Laboratory. Additional Funding by the Friends of Idaho Public Television and the Corporation for Public Broadcasting.
Force and Motion: Normal, Applied, & Frictional Forces
Clip: Special | 1m 4sVideo has Closed Captions
Scientists have classified forces into different kinds. Learn more about friction, applied forces and normal forces and how they work on the Earth and in the universe.
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Science Trek
Science Trek is a place where parents, kids, and educators can watch short, educational videos on a variety of science topics. Every Monday Science Trek releases a new video that introduces children to math, science, technology, engineering, and math (STEM) career potentials in a fun, informative way.[MUSIC] JOAN CARTAN-HANSEN, HOST: If you push on something, you are applying a force.
There're are few kinds of forces that act on objects.
The first is called normal force.
And you can see it in this experiment.
If you place a ruler so each end is supported and then place a small, heavy object on the middle, the ruler will bend.
The ruler wants to straighten up, but the heavier object is pulling it down.
That upward force is called a normal force.
The harder you push down, the more the ruler bends and the harder normal force pushes back.
Applied force is easier to explain.
If you push or pull on something, you are applying a force.
That action is called an applied force.
Frictional force is caused when two surfaces come in contact with each other.
It's the force that resists sliding or rolling of one surface over another.
Say you are scootering down the street.
Your shoe doesn't slide when you hit the ground.
But if you were walking on ice, the force of friction between your shoe and the ground is less and.
For more information about force and motion, check out the Science Trek website.
You'll find it at ScienceTrek.org
Force and Motion: Tension, Spring and Resisting Forces
Video has Closed Captions
Why is pancake syrup an example of a resistive force? (1m 4s)
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Science Trek is a local public television program presented by IdahoPTV
Major Funding by the Laura Moore Cunningham Foundation and the Idaho National Laboratory. Additional Funding by the Friends of Idaho Public Television and the Corporation for Public Broadcasting.