HPhys2

separation from a reference point

separation between two objects

a quantity that only has magnitude or size

a quantity that has both magnitude and direction

magnitude and direction of an object’s change in position (a vector); can be positive or negative

a scalar quantity

ratio of distance traveled to time interval

ratio of change in position to time interval over which change took place

if v is the same for all time intervals

is velocity

 object is moving at constant velocity.

velocity of an object at a given instant

is slope of the tangent at the time on a position-time graph

ratio of the change in velocity to the time interval over which it occurs.

is acceleration

Velocity-time graph is a straight line

is displacement.

is change in velocity.