motion
the result of unbalanced forces, change in speed and direction
force
a push or a pull, with both strength & direction
inertia
resistance to change
speed
distance traveled per unit time
velocity
speed of an object in a specific direction, the rate at which a position changes
mass
amount of matter in an object or the measure of inertia in an object
acceleration
the rate that velocity changes over time
weight
measure of gravitational attraction or force or gravity pulling one object toward the center of another object
friction
force that opposes motion between 2 sources
gravity
the force that pulls on objects and causes acceleration if the objects are not balanced by an opposing force
First Law of Motion
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.
Second Law of Motion
The greater the mass the greater the amount of force needed to accelerate the object. F=MxA
Third Law of Motion
For every action, there is an equal and opposite reaction.
net force
sum of all forces acting on an object
Newton
unit of force, the force required to accelerate 1kg of mass at 1m per second
balanced force
keeps an object moving with the same speed and direction (including at rest), net force is zero, no change in motion
unbalanced force
an objects speed and direction will change, net force is NOT zero, change in motion
reference point
a place or object used for comparison to determine if something is in motion
displacement
distance and direction of an object's change in position from the starting point
force pair
two forces exerted on two different objects from an action-reaction pair