Science 10 Unit 3- Motion

Acceleration, a

A change in the velocity of an object during a time interval; rate of change of velocity per unit of time. This includes speeding up and down.

Vector

A quantity that has both magnitude (size) and direction, such as displacement and position.

Scalar

A quantity that has only magnitude, or size such ad distance, time and temperature.

Velocity

A vector quantity that describes an object's displacement during a specific time interval or an object's rate of change of position.

Position

An object's distance and direction from a reference point.

Positive Direction

East and North

Uniform motion

Motion in which the object's displacement is equal for each time interval

Average velocity

The displacement if an object divided by the time interval it takes to travel the displacement.

Speed, v

The distance an object moved in a certain length of time.

Motion

The process of changing position.

Displacement

The straight line distance, or the difference, between the initial and the final position of an object.

Distance, d

The total lenght between two points or the total length travelled

Instantaneous velocity

The velocity (magnitude and direction) at a specific instant of time.

Negative Direction

West and South

Constant velocity

When an object travels at the same speed and the same direction for each time interval.

Reference point

a starting point used to describe the location or the positon of an object

Displacement

final position - initial position

Slope

rise over run

Changing velocity

whe an object's speed or direction, or both, change for each time interval.