Motion
How physical forces affect the human body
What is Biomechanics?
A rigid body that rotates around a fixed point
What is a lever?
A lower centre of mass and wider base of support will increase this
What is stability?
Obtaining information, visually or auditorily, to assess performance
What is qualitative biomechanics?
This is an example of linear motion
What is running, skating, skiing
When the sum of forces acting on a body is zero
What is Equilibrium?
An example of this type of lever is neck extension
What is a first class lever?
When an object is free in the air... this is constant
What is rotational momentum?
Mathematical analysis of movement.
What is quantitative biomechanics?
Three stages of learning a skill
What is preparation, execution, follow through
The energy stored in something.
What is potential energy?
75% of the muscles in your body function as this type of lever.
What is a third class lever?
Every action has an equal and opposite reaction.
What is Newton's Third Law?
If an adult is standing with both feet on the floor, arms at their sides then their centre of mass is located...
What is the belly button?
The force-producing movements the athletes make to produce force for the impact or propulsion.
What is the execution phase?
Energy can neither be created nor destroyed - It can only be transferred from one type to another.
What is Conservation of energy?
The shortest distance from the axis of rotation to the applied force.
What is the moment arm?
If a rigid object is pushed at some point away from its centre of mass then the object will be to...
What is rotate around its centre of mass?
The break down of skills for the purpose of error detection, equipment design, and injury prevention/rehab
What is digitization?
This phase is where the movement slows down after impact and the athlete prepares for the next action.
What is the follow through phase?
The average distance of the mass from the axis of rotation
Your lower leg while walking up the stairs is an example of this type of lever.
What is a second class lever?
There are three components of any lever
What are the applied force the load (resistance) and the fulcrum (axis)
The average position of all the parts of the system, weighted according to their masses
This is the best class (group of people) in the school
What is Period 1 - PSK 4U?