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Force
a push or pull that can change the object’s state of motion
Speed
the rate of change of an object’s position
Velocity
the rate of change of an object’s position and it’s direction
Displacement
an object’s change in position considering its starting and final position
Acceleration
the rate of change of velocity of an object
Momentum
A measurement of mass in motion
Formula: momentum = mass * velocity
p = m * v
Impulse
a certain amount of force you apply for a certain amount of time to cause a change in momentum
Formula: Impulse = force * time
p = F * t
A Velocity-Time graph shows
acceleration
On a velocity-time graph, if acceleration is increasing then
the line is going up and it has a positive slope
On a velocity-time graph, if acceleration is decreasing then
the line is going down and it has a negative slope
On a velocity-time graph, if acceleration is zero then
the line is horizontal and it has zero slope
A distance-time graph shows
speed/velocity
In a distance-time, the slope of the line is equal to
the speed of the object
In a force-time graph, impulse can be calculated by finding
the area under the curve
The more momentum an object has…
the harder it is to stop. Thus, it requires a greater amount of force or a longer amount of time
Center of mass (COM)
the point at which the entire mass of a body may be considered concentrated for some purposes; equally balanced in all directions
Base of Support (BOS)
the area beneath an object or person that includes every point of contact the object or person makes with the supporting surface
Line of Gravity (LOG)
an imaginary vertical line from the center
Stability
ability to control movement of body position following a disturbance
Balance
ability to control equilibrium (in relation to gravity)
Equilibrium
State of no acceleration (no change in speed or direction)
What factors affect stability?
COM height ( the lower the com the more stable)
BOS (the wider the more stable)
Relation between BOS & LOG (the closer the LOG to the middle of the BOS the more stable
