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Types of Motion

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Hanna Zinn

on 1 March 2018

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Transcript of Types of Motion

Forces Presents
Work, Energy, and Power
Potential and Kinetic Energy
Giant Slalom Alpine Skiing
Types of Motion
2D motion is present but mostly it is 1D motion
Moving down slope
Even when going into turns there is distinct straight motion from point a to point b.
2D Motion because
Moving due to gravity
Occasionally leaves ground
There is both Angular and Translational Motion
Moving the center of mass of the Skier from one point to another
Angular Motion
Turning throughout the run

Gravitational Force
Normal Force
Applied Force
Air Resistance
Frictional Force
Potential Energy is present before skier pushes off
As skier moves up and down at top of slope they build up kinetic energy
Kinetic Energy present as skier skis down the slope
Thermal energy as a result from the fiction between the skis and slope, small amount though
There is work done because the Potential Energy is being converted into Kinetic Energy and Thermal Energy
Work=Kinetic Energy + Potential Energy
Because of the fast rate of work being done, there is a high rate of power
Rotational Motion
The skier has potential energy at the top of the slope before they begin their run.
Some of the potential energy is converted to Kinetic energy as the skier moves just before the run begins
As the athlete skis down the slope, all of the Potential Energy is converted to Kinetic Energy because the velocity is increasing
There is only Potential Energy if the object is not moving, once the object starts to move, the potential energy begins to be converted to kinetic energy
Momentum is mass x velocity
Skiers whole run based on how much momentum he/she has
Key factor
At the top of the slope, as skiers prepare, move back and forth to build up a slight momentum to get started
As the Skier begins to go down the slope, they use their poles to gain velocity, increasing their momentum
As Skier goes down slope, gravity takes hold and the velocity of the skier increases, thus increasing the momentum

Motion that follows a curved path, contrasting from linear motion which just is motion in a straight line
Deals in angular velocity, angular acceleration, and an angle.
Present when the skier turns to go through the different gates
Have to rotate their bodies and skis as they aim to go through the gates.
It is a slight rotation, but rotation all the same.
What is Giant Slalom Alpine Skiing?
I'll let Lindsey Vonn show you
Vectors To Go With It
Free Body Diagram Showing all the Forces
Full transcript