Module 6 Terms
A physical measurement that contains only magnitude (number) and does not contain directional information
Scalar Quantity
A physical measurement that contains both magnitude (number) and directional information
Vector quantity
Friction that opposes motion once the motion has already started
Kinetic Friction
Scientist who came up with 3 Laws of Motion
Sir Isaac Newton
The change in an objects velocity over time
Acceleration
The ratio of the total distance traveled to the total time of the trip
average speed
The motion of an object when it is falling solely under the influence of gravity (without air resistance)
Free Fall
An object in motion (or at rest) will stay in motion (or at rest) unless acted upon by an unbalanced
Newton's 1st law
A point against which motion is measured
Reference point
A force that opposes motion, resulting when surfaces of objects rub against each other
Friction
A push or pull that acts on an object
Force
For every action there is an equal and opposite reaction
Newton's 3rd Law
The rate at which an object is moving at a given moment in time
instantaneous speed
9.8 m/s squared or 32 feet per second squared
acceleration due to gravity (near surface of earth)
The tendency of an object to resist changes in its velocity
Inertia
Force = mass x acceleration
Newton's Second Law
The distance an object travels plus the direction from the starting point
Displacement
Fluid friction that acts on objects moving through the air
Air resistance
Friction that opposes the initiation of motion
static friction
The SI Unit for Force
Newton