Chapter 3 Flashcards
1
Q
Biomechanics
A
The physics (mechanics) of motion produced by biological systems.
2
Q
Biological Systems include:
A
- shape/structure of bones/joints
- muscles
- nervous system
3
Q
What changes can happen that are predictable?
A
- Based on optimizing principles of motion and stability
- Can be seen across variety of motor skills
- Often produce more force, velocity, or accuracy
4
Q
Newtons Law of Motion (1867)
A
- to explain the relationship between forces and their impact on individual joints, as well as on total body motion
- These laws have many applications to physical education activities and sports
5
Q
What are newtons law of motion?
A
- Law of Inertia
- Law of Acceleration
- Law of Reaction
6
Q
Law of Inertia
A
- An object at rest stays at rest and an object in motion stays in motion until acted upon by a force
- A motionless object will remain motionless unless there is a net force acting on it.
- A body traveling with a constant speed along a straight path will continue its motion unless acted on be a net force
7
Q
Inertia
A
resistance to motion related to mass
8
Q
Momentum
A
the product of mass and velocity
9
Q
Friction and air resistance
A
two forces normally present that act on body in motion.
10
Q
Why not keep the limb extended throughout?
A
The leg will have too much rotational inertia
11
Q
Stability
A
Ability to resist movement
12
Q
Balance
A
ability to maintain equilibrium
13
Q
Increasing stability
A
- Increase base of support
- Lower the center of gravity
14
Q
Increasing balance
A
- Increase stability
- Improve strength, coordination, and proprioception
