Motion FlashCards

Motion

A change in an object's position over time

Position

The location of an object compared with a reference point

Reference Point

A place or object used to determine an object's position or motion

Motion Diagram

A diagram that shows an object's position or motion at different moments in time

Vector

A quantity that has both magnitude and direction

Vector Arrow

An arrow used to show the magnitude and direction of a vector

Magnitude

The size or amount of a quantity

Direction

The way an object is moving or pointing

Speed

How fast an object moves

Velocity

The speed of an object in a specific direction

Constant Speed

Motion in which an object's speed stays the same

Constant Velocity

Motion in which both speed and direction stay the same

Speeding Up

When an object's speed increases over time

Slowing Down

When an object's speed decreases over time

Acceleration

A change in velocity over time

Distance

The total amount of ground an object travels

Displacement

The change in an object's position from its starting position to its ending position

Initial Position

The position where an object starts

Final Position

The position where an object ends

Change in Position

The difference between an object's final position and initial position

Delta

A symbol that means change in

Delta X

The symbol used to represent displacement or change in position

Time

A measurement of how long an event or motion lasts

Time Interval

The amount of time between two moments

Velocity Formula

Velocity equals displacement divided by time

Displacement Formula

Displacement equals velocity multiplied by time

Time Formula

Time equals displacement divided by velocity

Meters

A common unit used to measure position, distance, and displacement

Seconds

A common unit used to measure time

Meters Per Second

A common unit used to measure speed and velocity

Equal Length Vector Arrows

Show that an object's speed is staying constant

Increasing Vector Arrow Length

Shows that an object is speeding up

Decreasing Vector Arrow Length

Shows that an object is slowing down

Arrow Direction

Shows the direction in which an object is moving

Equal Spacing in a Motion Diagram

Shows that an object is moving at a constant speed

Increasing Spacing in a Motion Diagram

Shows that an object is speeding up

Decreasing Spacing in a Motion Diagram

Shows that an object is slowing down

Change in Direction

A change in velocity even if the object's speed stays the same

Stationary

Not changing position over time

At Rest

Another way of saying that an object is not moving