P.E. - Chapter 4-5 Revision Flashcards
Mass
The amount of matter that makes up an object.
Weight
The measure of gravitational force acting on a body.
Linear Motion
Movement of the body where all parts move in the same direction at the same time along a line.
Angular Motion
Movement of a body part around an axis of rotation.
Distance
A path travelled by a body from point A to point B.
Displacement
Change of position of a body.
Speed
Distance divided by change in time.
Velocity
Displacement divided by change in time.
Acceleration
Rate of change of velocity over time.
Projectile Motion
Looks at the factors that influence the flight path on a projectile.
Magnus Effect
Deviation of a spinning object towards the direction of the spin.
Moment of Inertia
The resistance of an object to changes in its angular motion.
Angular Momentum
The quantity of angular motion of an object.
Equilibrium
When all forces and torques are balanced.
Stability
The ability of a body to resist a change in its current state of equilibrium.
Balance
The state of equilibrium and the ability to control it.
First Class Lever
The resistance and the force are on either side of the axis.
Second Class Lever
The resistance is between the force and the axis.
Third Class Lever
The force is between the resistance and the axis.
Qualitative Analysis
Analysis of human movement involving non-numeric descriptions.
Quantitative Analysis
Analysis of movement involving the use of numbers.
Momentum
The motion possessed by a moving body.
Impulse
Product of a force and the time period over which it is applied, which is equal to the change in momentum of an object.
Force
A push or pull acting on an object.
Inertia
The tendency of an object to resist change in it’s state of motion.
Velocity
Displacement divided by the change in time.
Coefficient of Restitution
A measure of elasticity of bodies involved in a collision.
Newton’s First Law
A body will remain in at rest or continue in a state of constant motion unless acted upon by external forces.
Newton’s Second Law
A force applied to an object will produce a change in motion in the direction of the applied force that is directly proportional to the size of the force.
Newton’s Third Law
For every action there is an equal an opposite reaction.
Torque
Force times lever arm.
Conservation of Momentum
The total momentum of the system before the collision is equal to the total momentum after the collision.
Field-testing Analysis
Outdoor environment analysis of subject.
Laboratory Analysis
Indoor analysis of subject.
