Biomechanics Flashcards
What’s a vector
A measurement that have magnitude and direction
Is acceleration a vector or a scalar measurement
Vector
Is acceleration a vector or scalar measurement?
Vector
What 4 factors always act on a person
Ground reaction force
Gravity
Air resistance
Friction
What is Newton’s first law of motion and what are 3 other key mark points
Law of inertia
Performer will remain still or move in a constant motion unless a force is applied
Force is applied by muscles
Performer continues in current state until another force is applied
What is newtons 2nd law of motion and what are the other 5 key mark points
Law of acceleration Force= mass x acceleration
Mass is constant
In order to accelerate a greater force must be produced
Force is produced by muscular contractions
Force produced is a ground reaction force
Greater the force the greater the acceleration
What is newtons 3rd law and what are the other 3 key mark points
Action and reaction
For each action there is an equal and oppressive reaction
Athlete produces the force into the ground or object
Ground or object applies equal and oppressive force back onto the athlete
What’s a scalar
Measurements based on magnitude
What are the 3 factors that will affect the horizontal distance a projectile travels
Height of release
Speed/ velocity of release
Angle of release
What is angular momentum
The quantity of rotation ( remains constant)
What is angular velocity
The speed of rotation
What is moment of inertia
The reluctance of a body to rotate
What is the formula for angular momentum
Angular momentum= angular velocity x moment of inertia
To increase angular velocity what must happen to moment of inertia
Decrease
How can a gymnast reduce there moment of inertia
Tucking body parts in tightly
